NAS DrivesUpdated
Updated

TerraMaster F4-425 Plus capacity calculator

Usable capacity and drive cost for the F4-425 Plus, 4 bays

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Quick answer

This calculator is pre-filled for the TerraMaster F4-425 Plus: 4 bays, drives up to 30TB, and classic RAID. Set your drive size to see usable terabytes after redundancy and overhead, plus the UK cost to fill the bays from the cheapest NAS-rated CMR drives.

As of 24 July 2026
Best £/TB at last check
£9.04
Products tracked
235
Prices last checked
24 July 2026

Pre-filled for the TerraMaster F4-425 Plus: 4 bays, up to 30TB per bay.

Usable capacity
29.10 TB
Raw total
32.00 TB
Fault tolerance
None
Cost to fill
£289

With 4x 8TB in RAID 0 you get about 29.10 TB usable and no fault tolerance. At the best £/TB at last check (£9.04/TB), filling these bays costs about £289.

Usable capacity is shown after binary and filesystem overhead (about 9%). Fault tolerance is not a backup; keep a separate copy of important data.

NAS-rated drives at 8.00 TB, best £/TB at last check

Prices last checked 24 July 2026
Seagate IronWolf 8TB NAS Hard Drive 3.5" 5400RPM 256MB Cache
8.00 TB · £25.00/TB at last check
£200.00
Buy on Amazon
WD Red Plus 8TB NAS 3.5" Internal Hard Drive - 5400 RPM Class, SATA 6 Gb/s, CMR, 128MB Cache, 3 Year Warranty
8.00 TB · £27.50/TB at last check
£219.99
Buy on Amazon

Prices are indicative, not live. The price on Amazon.co.uk at the time of purchase is the one that applies.

Capacity options for the F4-425 Plus

The F4-425 Plus has 4 bays accepting up to 30TB each, for about 120TB raw at maximum. It supports 7 array types. With one drive of redundancy you keep all but one drive's worth of capacity.

Pair this with NAS-rated CMR drives for a safe rebuild. The table below is sorted by UK price per terabyte.

How to read this result

The Usable capacity figure is what you can actually store after redundancy and formatting. The Raw total is the sum of the drives; the calculator subtracts the redundancy (one drive for RAID 5, two for RAID 6) and then about 9 percent for binary and filesystem overhead. The cost figure multiplies the raw capacity by the cheapest price per terabyte for NAS-rated CMR drives.

NAS drives to fill the F4-425 Plus, by price per TB

Price per
Prices last checked 24 July 2026235 products
ProductCapacityPrice£ / TBTypePrime
Seagate Exos X16, 6TB, Enterprise Internal Hard Drive, SAS, 3.5", for Business and Data Centre (ST6000NM0095)Used16.6 TB£150.00£9.04Enterprise HDD · SASCMREnterprise-
WBOBKO FOR 18TB 16TB 14TB 10TB 8TB 6TB 4TB IronWolf 3.5" SATA3 NAS Hard Drive 6GB/s 7200RPM(2TB ST2000VN004)18 TB£205.27£11.40NAS HDD · SATACMR-
Seagate Exos X16, 6TB, Enterprise Internal Hard Drive, SAS, 3.5", for Business and Data Centre (ST6000NM0095)16.6 TB£231.68£13.96Enterprise HDD · SASCMREnterprise-
Western Digital Ultrastar DC HC520 (HUH721212AL5204) SAS Enterprise HDD 7200 RPM, 12 TBUsed12 TB£225.00£18.75Enterprise HDD · SASCMREnterprise-
Seagate EXOS X24 24TB Interne Festplatte 3.5 Zoll SATA 3 Gbit/s 512 MB, ST24000NM000C (Renewed)Renewed24 TB£551.57£22.98Enterprise HDD · SATACMREnterprisePrime
WD Red Plus 12TB NAS 3.5" Internal Hard Drive - 7200 RPM, SATA 6Gb/s, CMR, 512MB CacheUsed12 TB£279.62£23.30NAS HDD · SATACMRPrime
WD Red Pro 12TB NAS 3.5" Internal Hard Drive - 7200 RPM, SATA 6 Gb/s, CMR, 512MB CacheUsed12 TB£279.95£23.33NAS HDD · SATACMR-
WD Ultrastar DC HC530 14TB 7200RPM SATA 6Gb/s 3.5" Enterprise HDD - WUH721414ALE6L4 (Renewed)Renewed14 TB£330.40£23.60Enterprise HDD · SATACMREnterprisePrime
Hard Drives Brand Seagate Model Seagate Exos X18 ST14000NM000J - Hard Drive - 14TB - Internal - SATA 6Gb/s - 7200rpm - buffer: 256 MB (Renewed)Renewed14 TB£331.47£23.68Enterprise HDD · SATACMREnterprisePrime
Seagate Exos 28TB internal server hard drive ST28000NM000C 3.5" HDD SATA 6Gb/s 7200RPM 512MB Cache (Renewed)Renewed28 TB£664.99£23.75Enterprise HDD · SATACMREnterprise-
HGST WD Ultrastar DC HC530 14TB SATA 6Gb/s 3.5-Inch Data Center HDD - WUH721414ALE604 0F31152 (Renewed)Renewed14 TB£334.78£23.91Enterprise HDD · SATACMREnterprisePrime
Seagate EXOS X16 16TB Interne Festplatte 3.5 Zoll SATA 6 Gbit/s 256 MB, ST16000NM001G (Renewed)Renewed16 TB£383.18£23.95Enterprise HDD · SATACMREnterprisePrime
Seagate Exos 26TB Internal Hard Drive, 3.5 Inch HDD, SATA3, 256MB Cache (Renewed)Renewed26 TB£624.99£24.04Enterprise HDD · SATACMREnterprise-
Seagate Exos 26TB Internal Hard Drive, 3.5 Inch HDD, SATA3, 256MB CacheUsed26 TB£639.88£24.61Enterprise HDD · SATACMREnterprise-
HGST WD Ultrastar DC HC510 10TB 7200RPM SATA 6Gb/s 3.5" SED Hard Drive - HUH721010ALE601 (0F27605) (Renewed)Renewed10 TB£247.88£24.79Enterprise HDD · SATACMREnterprisePrime
Seagate IronWolf 8TB NAS Hard Drive 3.5" 5400RPM 256MB CacheUsed8 TB£200.00£25.00NAS HDD · SATACMR-
Seagate IronWolf 12TB, NAS, Internal Hard Drive, CMR, 3.5 Inch, SATA, 6GB/s, 7.200 RPM, 256MB Cache, for RAID Network Attached Storage, Data Rescue Services, FFP (ST12000VNZ008)Used12 TB£301.53£25.13NAS HDD · SATACMRPrime
Seagate Exos X20 20TB Internal Hard Drive - 3.5 Inch Hyperscale SATA 6GB/s HDD, 7,200 RPM, 2.5M MTBF, 512e and 4Kn FastFormat, Low Latency with Enhanced Caching (ST20000NM007D)Used20 TB£508.57£25.43Enterprise HDD · SATACMREnterprisePrime
WD Red Plus 6TB NAS 3.5" Internal Hard Drive - 5400 RPM, SATA 6 Gb/s, CMR, 256MB CacheUsed6 TB£154.40£25.73NAS HDD · SATACMRPrime
Seagate IronWolf Pro 20TB, Enterprise Internal NAS HDD, CMR 3.5 Inch, SATA 6GB/s, 7.200 RPM, 256MB Cache for RAID NAS, Rescue Services - Frustration Free Packaging (ST20000NTZ01)Used20 TB£520.20£26.01NAS HDD · SATACMR-
HGST - WD Ultrastar DC HC520 HDD | HUH721212ALE600 | 12TB 7.2K SATA 6Gb/s 256MB Cache 3.5" Internal Hard Drive with Helium Data Center (Refurbished)Refurbished12 TB£315.66£26.31Enterprise HDD · SATACMREnterprisePrime
Seagate Exos X16 14TB server internal hard drive ST14000NM001G 3.5" HDD SATA 6Gb/s 7200RPM 256MB Cache14 TB£380.79£27.20Enterprise HDD · SATACMREnterprisePrime
Western Digital Ultrastar DC HC550 Enterprise-Festplatte 18 TB (3,5 inch, SATA 6 GB/s, SAS 12 GB/s, 7200 U/min, 512 MB Cache) (Renewed)Renewed18 TB£490.00£27.22Enterprise HDD · SASCMREnterprise-
WD Red Plus 8TB NAS 3.5" Internal Hard Drive - 5400 RPM Class, SATA 6 Gb/s, CMR, 128MB Cache, 3 Year WarrantyUsed8 TB£219.99£27.50NAS HDD · SATACMR-
WD Red Plus 8TB NAS 3.5" Internal Hard Drive - 5640 RPM Class, SATA 6 Gb/s, CMR, 128MB CacheUsed8 TB£219.99£27.50NAS HDD · SATACMR-
Seagate Skyhawk 4TB, Video Internal Hard Drive, 3.5", SATA, 6Gb/s, 64MB Cache, for DVR/NVR Security Camera System, with Drive Health Management, Data Rescue Services, FFP (ST4000VXZ16)Used4 TB£111.91£27.98NAS HDD · SATACMRPrime
Seagate EXOS X18 18TB ST18000NM000J Interne Server Festplatte, 3,5 Zoll HDD SATA 6GB/S 7200RPM 256MB 24X7 Verfügbarkeit (Renewed)Renewed18 TB£506.20£28.12Enterprise HDD · SATACMREnterprisePrime
Seagate IronWolf Pro ST8000NE001 8TB Internal 3.5" SATA 6Gb/s 7200rpm - 256MB - With 2 Years Rescue Data Recovery Service PlanUsed8 TB£225.00£28.13NAS HDD · SATACMR-
Western Digital Ultrastar DC HC530 (WUH721414ALE6L4) SATA Enterprise HDD 7200 RPM, 14 TB14 TB£395.00£28.21Enterprise HDD · SATACMREnterprise-
Seagate Exos X18 Enterprise Class, 18TB, Enterprise Internal Hard Drive, SATA, 3,5" 6Gbit/s, 128MB cache ((ST18000NM000J)Used18 TB£510.99£28.39Enterprise HDD · SATACMREnterprise-
Western Digital Ultrastar DC HC550 Enterprise Hard Drive 18TB (3.5" SATA 6Gbps, SAS 12Gbps, 7200RPM, 512MB Cache)18 TB£525.00£29.17Enterprise HDD · SASCMREnterprise-
WD Red Pro 20TB NAS 3.5" Internal Hard Drive - 7200 RPM, SATA 6 Gb/s, CMR, 512MB CacheUsed20 TB£586.14£29.31NAS HDD · SATACMRPrime
Western Digital Ultrastar DC HC550 3.5" 16000 GB Serial ATA III16 TB£470.00£29.38Enterprise HDD · SATACMREnterprise-
WD Ultrastar DC 0F38462 16TB 3.5" Enterprise SATA HDD/Hard Drive 7200rpm16 TB£475.00£29.69Enterprise HDD · SATACMREnterprise-
Seagate Exos X18 Enterprise 16TB CMR 3.5" Hyperscale SATA Hard Drive Model Number: ST16000NM000J (Refurbished)Refurbished16 TB£475.00£29.69Enterprise HDD · SATACMREnterprise-
Seagate IronWolf PRO 18TB Interne Festplatte CMR 3.5 Zoll SATA III 256 MB, ST18000NE000 (Renewed)Renewed18 TB£535.19£29.73NAS HDD · SATACMRPrime
Seagate Exos 7E8, 6TB, Enterprise Internal Hard Drive, SATA, 3.5", for Business and Data Centre (ST6000NM0115)8.6 TB£256.00£29.77Enterprise HDD · SATACMREnterprise-
Seagate IronWolf Pro 14 TB NAS RAID Internal Hard Drive - 7,200 RPM SATA 6 Gb/s 3.5-inch (ST14000NE0008)14 TB£420.00£30.00NAS HDD · SATACMR-
Seagate Exos X18 Enterprise Class, 18TB, Enterprise Internal Hard Drive, SATA, 3,5" 6Gbit/s, 128MB cache ((ST18000NM000J)18 TB£540.00£30.00Enterprise HDD · SATACMREnterprise-
Seagate IronWolf Pro, NAS Internal Hard Drive 20TB HDD, 3.5 Inch, 7200 rpm, CMR, 256 MB Cache, SATA 6GB/S, Silver, Model No.: ST20000NE00020 TB£610.77£30.54NAS HDD · SATACMRPrime
Seagate 16TB ST16000NM001G Exos X16 SATA 6Gb/s 7.2K RPM 512e/4Kn 256Mb, OEM, Mechanical Hard Disk16 TB£490.99£30.69Enterprise HDD · SATACMREnterprise-
WD Red Pro 24TB NAS 3.5" Internal Hard Drive - 7200 RPM, SATA 6 Gb/s, CMR, 512MB CacheUsed24 TB£742.75£30.95NAS HDD · SATACMRPrime
Seagate IronWolf Pro, 14 TB, Enterprise NAS Internal HDD –CMR 3.5 Inch, SATA 6 Gb/s, 7,200 RPM, 256 MB Cache for RAID Network Attached Storage, 3 year Rescue Services (ST14000NT001)14 TB£435.00£31.07Enterprise HDD · SATACMREnterprise-
Seagate IronWolf Pro 18TB NAS HDD, ST18000NE000 SATA 6Gb/s 3.5" (Renewed)Renewed18 TB£560.00£31.11NAS HDD · SATACMR-
Seagate IronWolf Pro 16TB, Enterprise Internal NAS HDD, CMR 3.5 Inch, SATA 6GB/s, 7.200 RPM, 256MB Cache for RAID NAS, Data Rescue Services, Frustration Free Packaging (ST16000NTZ01)Used16 TB£500.00£31.25NAS HDD · SATACMR-
WD Red Pro 10TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR Recording Technology, 512MB CacheUsed10 TB£313.66£31.37NAS HDD · SATACMRPrime
Seagate IronWolf Pro 6TB Interne hard disc 8.9cm (3.5 Zoll) SATA III ST6000NE000 BulkUsed6 TB£189.00£31.50NAS HDD · SATACMR-
Toshiba N300 14TB NAS 3.5-Inch Internal Hard Drive - CMR SATA 6 GB/s 7200 RPM 256 MB Cache - HDWG21EXZSTA14 TB£441.27£31.52NAS HDD · SATACMRPrime
Western Digital Ultrastar DC HC310 (HUS726T6TALE6L4) SATA Enterprise HDD 7200 RPM, 6 TBUsed6 TB£189.23£31.54Enterprise HDD · SATACMREnterprise-
WD 10TB WUS721010ALE6L4 Ultrastar DC HC330* Ent.10 TB£317.90£31.79Enterprise HDD · SATACMREnterprise-
Seagate IronWolf Pro 16TB, Enterprise Internal NAS HDD, CMR 3.5 Inch, SATA 6GB/s, 7.200 RPM, 256MB Cache for RAID NAS, Data Rescue Services, Frustration Free Packaging (ST16000NTZ01)16 TB£509.00£31.81NAS HDD · SATACMRPrime
WD Red Plus 10TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6Gb/s, CMR, 256MB CacheUsed10 TB£329.00£32.90NAS HDD · SATACMR-
Seagate 6TB IronWolf ST6000VN001 5400RPM 256MB NASUsed6 TB£199.00£33.17NAS HDD · SATACMR-
Seagate SkyHawk 6TB, Video Internal Hard Drive, 3.5", SATA, 6Gb/s, 64MB Cache, for DVR/NVR Security Camera System, with Drive Health Management, Data Rescue Services, FFP (ST6000VXZ09)6 TB£199.28£33.21NAS HDD · SATACMRPrime
WD Red 6TB NAS 3.5 Inch Internal Hard Drive - 5400 RPM Class, SATA 6 Gb/s, CMR, 64 MB Cache - WD60EFRX Red WD60EFRXUsed6 TB£199.99£33.33NAS HDD · SATACMR-
Toshiba 16TB N300 NAS Internal HDD - 3.5" SATA-3 512MB Cache 6GB/s 7200RPM Internal Hard Drive 7/24 NAS Unit Server & Security Drive (HDWG51GUZSVA)16 TB£539.88£33.74NAS HDD · SATACMR-
Seagate IronWolf Pro ST20000NE00 RV sensor 8.9 cm (3.5") NAS 20TB HDD (CMR)20 TB£675.00£33.75NAS HDD · SATACMR-
Seagate SkyHawk 8TB, Video Internal Hard HDD, 3.5", SATA 6Gb/s, 256MB Cache, for DVR NVR Security Camera System, with in-house Data Rescue Services, FFP (ST8000VXZ10)Used8 TB£270.99£33.87NAS HDD · SATACMR-
Seagate IronWolf Pro 20TB, Enterprise Internal NAS HDD, CMR 3.5 Inch, SATA 6GB/s, 7.200 RPM, 256MB Cache for RAID NAS, Rescue Services - Frustration Free Packaging (ST20000NTZ01)20 TB£680.00£34.00NAS HDD · SATACMRPrime
Seagate SkyHawk 8TB, Video Internal Hard HDD, 3.5", SATA 6Gb/s, 256MB Cache, for DVR NVR Security Camera System, with in-house Data Rescue Services, FFP (ST8000VXZ10)8 TB£273.22£34.15NAS HDD · SATACMRPrime
WD Red Plus 4TB NAS 3.5" Internal Hard Drive - 5400 RPM, SATA 6Gb/s, CMR, 128MB CacheUsed4 TB£136.93£34.23NAS HDD · SATACMRPrime
Seagate SkyHawk AI, 12 TB, Surveillance Internal Hard Drive HDD – 3.5 Inch SATA 6 Gb/s 256 MB Cache for DVR NVR Security Camera System, and Three-year Rescue Services (ST12000VE0008)12 TB£412.10£34.34NAS HDD · SATACMR-
Seagate IronWolf Pro 12TB, Enterprise Internal NAS HDD, CMR 3.5 Inch, SATA 6GB/s, 7.200 RPM, 256MB Cache for RAID NAS, Data Rescue Services, Frustration Free Packaging (ST12000NTZ01)12 TB£416.52£34.71NAS HDD · SATACMR-
Seagate IronWolf 4TB, NAS, Internal Hard Drive, CMR, 3.5 Inch, SATA, 6GB/s, 5.400 RPM, 256MB Cache, for RAID Network Attached Storage, Data Rescue Services (ST4000VNZ06)Used4 TB£138.97£34.74NAS HDD · SATACMRPrime
ST20000NE000 20TB, NAS Internal Hard Drive, 3.5 Inch, 7200 rpm, CMR, 256 MB Cache, SATA 6 GB/S20 TB£695.00£34.75NAS HDD · SATACMR-
Seagate IronWolf 12TB, NAS, Internal Hard Drive, CMR, 3.5 Inch, SATA, 6GB/s, 7.200 RPM, 256MB Cache, for RAID Network Attached Storage, Data Rescue Services, FFP (ST12000VNZ008)12 TB£418.41£34.87NAS HDD · SATACMRPrime
G-DRIVE 26TB Enterprise Class Desktop external Hard Drive, HDD up to 260 MB/s, USB-C, USB 3.2 Gen 2 (10Gbps), 7200RPM Ultrastar, Fast backup, Premium, Industrial enclosure26 TB£906.87£34.88Enterprise HDD · SATACMREnterprisePrime
WD Red Pro 14TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR Recording Technology, 512MB Cache14 TB£489.99£35.00NAS HDD · SATACMR-
Seagate IronWolf Pro 3.5-inch 18TB Internal Hard Disk HDD CMR 3.5 Inch Data Recovery ST18000NT001 6Gb/s 256MB 7200 rpm 24 Hour Operation PC18 TB£637.10£35.39NAS HDD · SATACMR-
Seagate IronWolf Pro, 12 TB, NAS Internal Hard Drive, CMR 3.5 Inch, SATA 6 Gb/s 7,200 RPM, 256 MB Cache, for RAID Network Attached Storage, 3 years Rescue Services, FFP (ST12000NE0008)12 TB£425.00£35.42NAS HDD · SATACMR-
Seagate IronWolf internal hard drive 3.5 12TB HDD 3 years warranty 256MB 7200rpm 24 hours operation PC NAS for RV sensor ST12000VN000812 TB£425.00£35.42NAS HDD · SATACMR-
Seagate IronWolf, 8 TB, NAS, Internal Hard Drive, CMR, 3.5 Inch, SATA, 6GB/s, 5,400 RPM, 256MB Cache, for RAID Network Attached Storage, 3 year Rescue Services (ST8000VN004)Used8 TB£285.00£35.63NAS HDD · SATACMR-
Seagate IronWolf Pro 4TB, Enterprise Internal NAS HDD, CMR, 3.5 Inch, SATA 6GB/s, 7.200 RPM, 256MB Cache for RAID NAS, Data Rescue Services, Frustration Free Packaging (ST4000NTZ01)Used4 TB£143.25£35.81NAS HDD · SATACMRPrime
Seagate IronWolf, 16 TB, NAS, Internal Hard Drive, CMR, 3.5 Inch, SATA, 6GB/s, 5,400 RPM, 256MB Cache, for RAID Network Attached Storage, 3 year Rescue Services (ST16000VN001)16 TB£579.00£36.19NAS HDD · SATACMR-
Toshiba 12TB N300 Internal Hard Drive – NAS 3.5 Inch SATA HDD Supports Up to 8 Drive Bays Designed for 24/7 NAS Systems, New Generation (HDWG21CUZSVA)12 TB£434.97£36.25NAS HDD · SATACMR-
WESTERN DIGITAL ULTRASTAR DC HC310 HUS726T6TAL5204 3.5" 6000 GB SAS Black6 TB£218.90£36.48Enterprise HDD · SASCMREnterprise-
Seagate IronWolf Pro 30TB, NAS internal hard drive, 3.5", 7200 U/Min, CMR, 512 MB Cache, SATA 6 GB/S, Data Rescue Service (ST30000NTZ11)30 TB£1,095.99£36.53NAS HDD · SATACMRPrime
Seagate Skyhawk 4TB, Video Internal Hard Drive, 3.5", SATA, 6Gb/s, 64MB Cache, for DVR/NVR Security Camera System, with Drive Health Management, Data Rescue Services, FFP (ST4000VXZ16)4 TB£146.26£36.57NAS HDD · SATACMRPrime
Seagate IronWolf Pro 24TB, NAS Internal Hard Drive, 3.5 Inch, 7.200 U/Min, CMR, 256MB Cache, SATA 6 GB/S, incl. Datat Rescue Service (ST24000NTZ02)24 TB£878.99£36.62NAS HDD · SATACMRPrime
WD Red Plus 4TB NAS 3.5" Internal Hard Drive - 5400 RPM, SATA 6Gb/s, CMR, 128MB Cache4 TB£146.99£36.75NAS HDD · SATACMRPrime
WD Red Plus 10TB NAS 3.5" Internal Hard Drive - 7200 RPM, SATA 6Gb/s, CMR, 256MB Cache10 TB£370.44£37.04NAS HDD · SATACMR-
Seagate IronWolf 6TB NAS 3.5" SATA HDD/Hard Drive6 TB£223.00£37.17NAS HDD · SATACMR-
Seagate Skyhawk AI 16TB, Video Internal Hard Drive, 3.5 Inch, SATA, 6Gb/s, 256MB Cache, for DVR/NVR Security Camera System, Data Rescue Service (ST16000VE004)16 TB£595.00£37.19NAS HDD · SATACMR-
WD Red Pro 26TB NAS 3.5" Internal Hard Drive - 7200 RPM, SATA 6 Gb/s, CMR, 512MB Cache26 TB£968.36£37.24NAS HDD · SATACMR-
WD Purple Pro 24TB Smart Video 3.5" Internal Hard Drive, AllFrame AI Technology, 7200 RPM, SATA 6 GB/s, 550TB/yr, 512MB Cache24 TB£897.00£37.38NAS HDD · SATACMR-
Toshiba N300 16TB NAS 3.5-Inch Internal Hard Drive - CMR SATA 6 GB/s 7200 RPM 512 MB Cache - HDWG51GXZSTA16 TB£598.99£37.44NAS HDD · SATACMR-
Seagate Exos 7E8, 8TB, Enterprise Internal Hard Drive, SATA, 3.5", for Business and Data Centre (ST8000NM0055)8.8 TB£329.52£37.45Enterprise HDD · SATACMREnterprise-
Seagate IronWolf Pro, 4 TB, NAS Internal Hard Drive, CMR 3.5 Inch, SATA 6 Gb/s 7,200 RPM, 256 MB Cache, for RAID Network Attached Storage, 3 years Rescue Services, FFP (ST4000NE001)Used4 TB£150.00£37.50NAS HDD · SATACMR-
Seagate IronWolf Pro ST8000NE001 8TB Internal 3.5" Inch SATA 6Gb/s 7200rpm Server HDD (Renewed)Renewed8 TB£302.99£37.87NAS HDD · SATACMR-
Seagate IronWolf, 8 TB, NAS, Internal Hard Drive, CMR, 3.5 Inch, SATA, 6GB/s, 5,400 RPM, 256MB Cache, for RAID Network Attached Storage, 3 year Rescue Services (ST8000VN004)8 TB£303.98£38.00NAS HDD · SATACMR-
Seagate IronWolf 2TB, Enterprise Internal NAS HDD, CMR 3.5 Inch, SATA 6GB/s, 5900 RPM, 256MB Cache for RAID NAS, Data Rescue Services, Frustration Free Packaging (ST2000VNZ03)Used2 TB£76.10£38.05NAS HDD · SATACMRPrime
Seagate IronWolf 8TB, Internal NAS HDD, CMR, 3.5 Inch, SATA, 6GB/s, 5.400 RPM, 256MB Cache, Data Rescue Services, (ST8000VNZ02)Used8 TB£305.00£38.13NAS HDD · SATACMR-
Seagate IronWolf Pro, 14 TB, NAS Internal Hard Drive, CMR 3.5 Inch, SATA 6 Gb/s 7,200 RPM, 256 MB Cache, for RAID Network Attached Storage, 3 years Rescue Services, FFP (ST14000NE0008)14 TB£535.00£38.21NAS HDD · SATACMR-
Western Digital Hitachi HDD Int 10TB Ultrastar 72 SATA 3.5 HUH721010ALE60410 TB£382.38£38.24Enterprise HDD · SATACMREnterprise-
Seagate IronWolf Pro 8TB, Enterprise Internal NAS HDD, CMR 3.5 Inch, SATA 6GB/s, 7.200 RPM, 256MB Cache for RAID NAS, Data Rescue Services, Frustration Free Packaging (ST8000NTZ01)8 TB£306.00£38.25NAS HDD · SATACMRPrime
TOSHIBA N300 PRO 24TB Large-Sized Business NAS (up to 24 Bays) 3.5-Inch Internal Hard Drive - Up to 550 TB/Year Workload Rate CMR SATA 6 Gb/s 7200 RPM 1.0 GB Cache - HDWG82EXZSTB24 TB£918.09£38.25NAS HDD · SATACMR-
WD Ultrastar DC HC555 Hard Drive Data Centre 12 TB Internal 3.5 Inches (8.9 cm)12 TB£470.00£39.17Enterprise HDD · SATACMREnterprise-
WD Ultrastar DC HC580 WUH722424ALE6L4 - Hard Drive - 24 TB - Internal - 3.5" (8.9 cm) - SATA 6Gb/s - 7200 RPM - Buffer: 512 MB24 TB£946.88£39.45Enterprise HDD · SATACMREnterprise-
WD Red Pro 8TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR Recording Technology, 256MB Cache8 TB£316.40£39.55NAS HDD · SATACMR-
WD Red Pro 18TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR Recording Technology, 512MB Cache18 TB£716.79£39.82NAS HDD · SATACMR-
Seagate IronWolf, 8 TB, Enterprise Internal NAS HDD – CMR 3.5 Inch, SATA 6 Gb/s, 7,200 RPM, 256 MB Cache for RAID NAS, Rescue Services (ST8000NT002)8 TB£319.00£39.88NAS HDD · SATACMR-
Toshiba N300 12TB NAS 3.5-Inch Internal Hard Drive - CMR SATA 6 Gb/s 7200 RPM 256 MB Cache - HDWG21CXZSTA12 TB£478.77£39.90NAS HDD · SATACMR-
Seagate IronWolf Pro, 10 TB, Enterprise NAS Internal HDD –CMR 3.5 Inch, SATA 6 Gb/s, 7,200 RPM, 256 MB Cache for RAID Network Attached Storage, 3 year Rescue Services (ST10000NT001)10 TB£399.99£40.00Enterprise HDD · SATACMREnterprise-
Seagate 10 TB IronWolf NAS 3.5 Inch Hard Drive ST10000VN0008 (SATA 6 Gb/s/256 MB/7200 RPM)10 TB£400.00£40.00NAS HDD · SATACMR-
Western Digital HDD Desk Red Pro 8TB 3.5 SATA 256MB8 TB£322.00£40.25NAS HDD · SATACMR-
WD Red Pro 18TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR, 512MB Cache18 TB£729.98£40.55NAS HDD · SATACMR-
Toshiba N300 8TB NAS 3.5-Inch Internal Hard Drive - CMR SATA 6 GB/s 7200 RPM 256 MB Cache - HDWG180XZSTA8 TB£325.00£40.63NAS HDD · SATACMR-
WD Red Pro 16TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR Recording Technology, 512MB Cache16 TB£653.99£40.87NAS HDD · SATACMR-
Seagate IronWolf 4TB, NAS, Internal Hard Drive, CMR, 3.5 Inch, SATA, 6GB/s, 5.400 RPM, 256MB Cache, for RAID Network Attached Storage, Data Rescue Services (ST4000VNZ06)4 TB£165.00£41.25NAS HDD · SATACMRPrime
TOSHIBA N300 PRO 22TB Large-Sized Business NAS (up to 24 Bays) 3.5-Inch Internal Hard Drive - Up to 300 TB/Year Workload Rate CMR SATA 6 Gb/s 7200 RPM 512 MB Cache - HDWG62CXZSTB22 TB£909.44£41.34NAS HDD · SATACMR-
TOSHIBA N300 12TB NAS 3.5-Inch Internal Hard Drive - CMR SATA 6 Gb/s 7200 RPM 512 MB Cache - HDWG51CXZSTA12 TB£499.99£41.67NAS HDD · SATACMR-
Seagate Skyhawk 4 TB, Video Internal Hard HDD – 3.5", SATA 6Gb/s, 256MB Cache, for DVR NVR Security Camera System, with in-house Rescue Services (ST4000VX016)4 TB£167.43£41.86NAS HDD · SATACMR-
Toshiba N300 NAS HARD DRIVE 22TB BULK Serial ATA GB 7200rpm SATA 512MB22 TB£921.80£41.90NAS HDD · SATACMR-
Seagate IronWolf, 4 TB, NAS, Internal Hard Drive, CMR 3.5 Inch, SATA, 6GB/s, 5,900 RPM, 64MB Cache, for RAID Network Attached Storage, 3 year Rescue Services (ST4000VN008)4 TB£167.99£42.00NAS HDD · SATACMR-
WD Red Plus 10TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6Gb/s, CMR, 256MB Cache10 TB£419.99£42.00NAS HDD · SATACMR-
WD Red Plus 10TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s, CMR, 256MB Cache, 3.5 Inch10 TB£420.00£42.00NAS HDD · SATACMR-
Seagate IronWolf 4 TB NAS Internal Hard Drive HDD – CMR 3.5 Inch SATA 6 Gb/s 5,400 RPM 256 MB Cache for RAID Network Attached Storage, Rescue Services (ST4000VN006)4 TB£168.99£42.25NAS HDD · SATACMR-
WD Purple 4TB Surveillance 3.5" Internal Hard Drive, AllFrame Technology, 180BT/yr, 256MB Cache, 3 Year WarrantyUsed4 TB£169.00£42.25NAS HDD · SATACMR-
WD Red Plus 4TB NAS 3.5" Internal Hard Drive - 5400 RPM, SATA 6Gb/s, CMR, 128MB CacheUsed4 TB£169.65£42.41NAS HDD · SATACMR-
Western Digital WD Red Plus Internal Hard Drive 8TB CMR 3.5 inch SATA 5640 rpm 256MB NAS WD80EFPX-AJP Eco Package8 TB£339.88£42.49NAS HDD · SATACMR-
Seagate IronWolf Pro 4TB, Enterprise Internal NAS HDD, CMR, 3.5 Inch, SATA 6GB/s, 7.200 RPM, 256MB Cache for RAID NAS, Data Rescue Services, Frustration Free Packaging (ST4000NTZ01)4 TB£169.99£42.50NAS HDD · SATACMRPrime
Seagate IronWolf, 6 TB internal Hard Drive, NAS HDD, 3.5 Inch, 5400 U/Min, CMR, 64 MB Cache, SATA 6 GB/s, 3 Years Rescue Service, Modellnr.: ST6000VN0066 TB£255.00£42.50NAS HDD · SATACMR-
Seagate Exos 7E10 8TB Internal Hard Drive HDD - 3.5 Inch 512e/4Kn SAS 6GB/s, 7.200 RPM, 256MB Cache and 2M MTBF for Enterprise, Data Centre (ST8000NM017B)8 TB£339.99£42.50Enterprise HDD · SASCMREnterprise-
WD Red Plus 2TB NAS 3.5" Internal Hard Drive - 5400 RPM Class, SATA 6Gb/s, CMR, 64MB CacheUsed2 TB£85.79£42.90NAS HDD · SATACMR-
TOSHIBA N300 10TB NAS 3.5-Inch Internal Hard Drive - CMR SATA 6 Gb/s 7200 RPM 512 MB Cache - HDWG71AXZSTA10 TB£429.00£42.90NAS HDD · SATACMR-
WD Red Pro 12TB NAS 3.5" Internal Hard Drive - 7200 RPM, SATA 6 Gb/s, CMR, 512MB Cache12 TB£517.08£43.09NAS HDD · SATACMR-
Toshiba N300 8TB NAS 3.5-Inch Internal Hard Drive - CMR SATA 6 GB/s 7200 RPM 256 MB Cache - HDWG480XZSTA, Silver8 TB£347.99£43.50NAS HDD · SATACMR-
TOSHIBA N300 8TB NAS 3.5-Inch Internal Hard Drive - CMR SATA 6 GB/s 7200 RPM 512 MB Cache - HDWG780XZSTA8 TB£347.99£43.50NAS HDD · SATACMR-
WD Red Pro 8TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR, 256MB Cache8 TB£348.97£43.62NAS HDD · SATACMR-
Seagate IronWolf Pro ST8000NE001 8TB Internal 3.5" SATA 6Gb/s 7200rpm - 256MB - With 2 Years Rescue Data Recovery Service Plan8 TB£349.00£43.63NAS HDD · SATACMR-
Seagate IronWolf 6TB, Internal NAS HDD, CMR 3.5 Inch, SATA 6GB/s, 5400 RPM, 256MB Cache for RAID NAS, Data Rescue Services, Frustration Free Packaging (ST6000VNZ06)6 TB£262.31£43.72NAS HDD · SATACMRPrime
Seagate IronWolf 8TB, Internal NAS HDD, CMR, 3.5 Inch, SATA, 6GB/s, 5.400 RPM, 256MB Cache, Data Rescue Services, (ST8000VNZ02)8 TB£350.40£43.80NAS HDD · SATACMRPrime
Seagate IronWolf 10TB, NAS, Internal Hard Drive, CMR, 3.5 Inch, SATA, 6GB/s, 7.200 RPM, 256MB Cache, for RAID Network Attached Storage, Data Rescue Services, FFP (ST10000VNZ00)10 TB£438.99£43.90NAS HDD · SATACMR-
Seagate IronWolf Pro, 4 TB, NAS Internal Hard Drive, CMR 3.5 Inch, SATA 6 Gb/s 7,200 RPM, 256 MB Cache, for RAID Network Attached Storage, 3 years Rescue Services, FFP (ST4000NE001)4 TB£175.99£44.00NAS HDD · SATACMR-
WD Red Pro 6TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR Recording Technology, 256MB Cache6 TB£263.98£44.00NAS HDD · SATACMR-
WD Red Pro 20TB NAS 3.5" Internal Hard Drive - 7200 RPM, SATA 6 Gb/s, CMR, 512MB Cache20 TB£879.99£44.00NAS HDD · SATACMR-
WD Red Pro 22TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR Recording Technology, 512MB Cache22 TB£982.00£44.64NAS HDD · SATACMR-
Seagate Exos 7E10 10TB Internal Hard Drive HDD - 3.5 Inch 4Kn SAS 6GB/s, 7.200 RPM, 256MB Cache and 2M MTBF for Enterprise, Data Centre (ST10000NM002B)10 TB£447.99£44.80Enterprise HDD · SASCMREnterprise-
WD Red Plus 6TB NAS 3.5" Internal Hard Drive - 5400 RPM Class, SATA 6Gb/s, CMR, 256MB Cache6 TB£269.15£44.86NAS HDD · SATACMRPrime
WD Red Plus 4TB NAS 3.5" Internal Hard Drive - 5400 RPM, SATA 6Gb/s, CMR, 128MB Cache4 TB£179.69£44.92NAS HDD · SATACMR-
WD Red Plus 8TB NAS 3.5" Internal Hard Drive - 5400 RPM Class, SATA 6 Gb/s, CMR, 128MB Cache, 3 Year Warranty8 TB£359.99£45.00NAS HDD · SATACMR-
Toshiba N300 PRO 10TB Large-Sized Business NAS (up to 24 bays) 3.5-Inch Internal Hard Drive - Up to 300 TB/year Workload Rate CMR SATA 6 GB/s 7200 RPM 512 MB Cache - HDWG51AXZSTB10 TB£450.71£45.07NAS HDD · SATACMR-
WD Red Pro 12 TB 3.5 Inch NAS Internal Hard Drive - 7200 RPM - WD121KFBX12 TB£543.96£45.33NAS HDD · SATACMR-
WD Purple 4TB Surveillance 3.5" Internal Hard Drive, AllFrame Technology, 180BT/yr, 256MB Cache, 3 Year Warranty4 TB£185.00£46.25NAS HDD · SATACMR-
Toshiba MG09ACA16TE / JP-EC 7,200 rpm SATA 24x7 RV Sensor, Helium-Filled Hard Drive16 TB£742.95£46.43Enterprise HDD · SATACMREnterprisePrime
Toshiba 6TB N300 Internal Hard Drive – NAS 3.5 Inch SATA HDD Supports Up to 8 Drive Bays Designed for 24/7 NAS Systems, New Generation (HDWG460UZSVA)6 TB£278.75£46.46NAS HDD · SATACMR-
WD Red Pro 20TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR Recording Technology, 512MB Cache20 TB£929.99£46.50NAS HDD · SATACMR-
WD Red Plus 2TB NAS 3.5" Internal Hard Drive - 5400 RPM, SATA 6 Gb/s, CMR, 64MB CacheUsed2 TB£93.16£46.58NAS HDD · SATACMRPrime
Seagate IronWolf Pro, 10TB, Internal Hard Drive, NAS, 3.5 Inch, SATA, 6GB/s, 7200 RPM, 256MB Cache, for RAID Network Attached Storage, 3 year Rescue Services, FFP (ST10000NEZ008)10 TB£469.99£47.00NAS HDD · SATACMR-
Seagate 6TB IronWolf ST6000VN001 5400RPM 256MB NAS6 TB£282.24£47.04NAS HDD · SATACMR-
WD Red Pro 24TB NAS 3.5" Internal Hard Drive - 7200 RPM, SATA 6 Gb/s, CMR, 512MB Cache24 TB£1,129.93£47.08NAS HDD · SATACMR-
Seagate IronWolf Pro 12 TB Internal Hard Drive 7200 RPM for NAS - ST12000NT00112 TB£567.00£47.25NAS HDD · SATACMR-
Seagate SkyHawk 2TB, Video Internal Hard HDD, 3.5", SATA 6Gb/s, 256MB Cache, for DVR NVR Security Camera System, with in-house Data Rescue Services, FFP (ST2000VXZ17)2 TB£95.00£47.50NAS HDD · SATACMRPrime
WD Red Pro 8TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR, 256MB Cache8 TB£379.99£47.50NAS HDD · SATACMR-
WD Red 6TB NAS 3.5 Inch Internal Hard Drive - 5400 RPM Class, SATA 6 Gb/s, CMR, 64 MB Cache - WD60EFRX Red WD60EFRX6 TB£285.55£47.59NAS HDD · SATACMR-
Toshiba N300 PRO 12TB Large-Sized Business NAS (up to 24 bays) 3.5-Inch Internal Hard Drive - Up to 300 TB/year Workload Rate CMR SATA 6 GB/s 7200 RPM 512 MB Cache - HDWG51CXZSTB12 TB£577.62£48.14NAS HDD · SATACMR-
Toshiba HDWQ140UZSVA - 4TB N300 NAS Internal HDD Bulk4 TB£195.00£48.75NAS HDD · SATACMR-
Seagate IRONWOLF PRO ST10000NE0008 10TB SATA 7200 RPM 3.5 256MB 3.5 IN, ST10000NE0008 (RPM3.5 256MB 3.5IN)10 TB£495.00£49.50NAS HDD · SATACMR-
Seagate Exos 7E10 4TB Internal Hard Drive HDD - 3.5 Inch 512e/4Kn SAS 6GB/s, 7.200 RPM, 256MB Cache and 2M MTBF for Enterprise, Data Centre (ST4000NM000B)Used4 TB£198.59£49.65Enterprise HDD · SASCMREnterprise-
WD Red Pro 6TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR, 256MB Cache6 TB£297.99£49.67NAS HDD · SATACMR-
Seagate IronWolf Pro ST4000NE001 - HDD - 4 TB - Internal - 3.5" - SATA 6Gb/s - 7200 RPM - Buffer: 256 MB - with Piano di Assistenza Recupero Dati di Emergenza di 2 Anni4 TB£200.00£50.00NAS HDD · SATACMR-
Seagate IronWolf Pro, 6 TB, Enterprise NAS Internal HDD –CMR 3.5 Inch, SATA 6 Gb/s, 7,200 RPM, 256 MB Cache for RAID Network Attached Storage, 3 year Rescue Services (ST6000NT001)6 TB£299.99£50.00Enterprise HDD · SATACMREnterprise-
WD Red Pro 8TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR, 256MB Cache, 5 Year Warranty8 TB£399.99£50.00NAS HDD · SATACMR-
TOSHIBA 8.9cm (3.5") 8TB SATA3 NAS N300 7200RPM internal bulk8 TB£400.00£50.00NAS HDD · SATACMR-
WD Ultrastar DC HA340 WUS721208BLE6L4 Hard Drive Data Centre 8 TB Internal 3.5 Inch SATA 6Gb/s 7200 RPM Buffer: 256 MB8 TB£406.16£50.77Enterprise HDD · SATACMREnterprise-
Western Digital Ultrastar DC HC570 3.5" 22 TB Serial ATA III22 TB£1,123.99£51.09Enterprise HDD · SATACMREnterprise-
WD Red Plus WD60EFPX Internal Hard Drive NAS 6 TB Internal 3.5 Inch SATA 6Gbs 5400 tpm Buffer: 256 MB6 TB£307.00£51.17NAS HDD · SATACMR-
Toshiba N300 PRO 14TB Large-Sized Business NAS (up to 24 bays) 3.5-Inch Internal Hard Drive - Up to 300 TB/year Workload Rate CMR SATA 6 GB/s 7200 RPM 512 MB Cache - HDWG51EXZSTB14 TB£716.45£51.18NAS HDD · SATACMR-
Western Digital WD Ultrastar DC HC555 SATA HDD - 20 TB20 TB£1,024.70£51.24Enterprise HDD · SATACMREnterprise-
WD Red Pro 6TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR, 256MB Cache, 5 Year Warranty6 TB£308.99£51.50NAS HDD · SATACMR-
WD Ultrastar DC HC590 26TB SATA 6Gb/s 3.5" Enterprise Hard Drive – WUH722626ALE6L4 (0F65672) – High-Capacity Data Center HDD26 TB£1,351.21£51.97Enterprise HDD · SATACMREnterprise-
Synology DS223 24TB 2 Bay Desktop NAS Solution installed with 2 x 12TB Western Digital Red Plus Drives24 TB£1,253.99£52.25NAS HDD · SATACMR-
WD Western Digital Red Plus 3.5" 4000 GB Serial ATA III4 TB£209.88£52.47NAS HDD · SATACMR-
Western Digital WD40EFZX WD Red Plus 4TB SATA 6Gb/s 3.5" HDD4 TB£209.89£52.47NAS HDD · SATACMR-
Western Digital WD Red Plus 8TB SATA 6Gb/s 3.5" HDD8 TB£429.00£53.63NAS HDD · SATACMR-
Toshiba N300 4TB NAS 3.5-Inch Internal Hard Drive - CMR SATA 6 GB/s 7200 RPM 512 MB Cache - HDWG740XZSTC4 TB£214.83£53.71NAS HDD · SATACMR-
TOSHIBA N300 6TB NAS 3.5-Inch Internal Hard Drive - CMR SATA 6 GB/s 7200 RPM 512 MB Cache - HDWG760XZSTA6 TB£325.00£54.17NAS HDD · SATACMR-
WD Red Plus 4TB NAS 3.5" Internal Hard Drive - 5400 RPM Class, SATA 6 Gb/s, CMR, 64MB Cache4 TB£219.00£54.75NAS HDD · SATACMR-
Seagate IronWolf Pro Hard NAS SATA Internal Hard Drive 6Gb/s8 TB£439.00£54.88NAS HDD · SATACMR-
Seagate Exos 7E10 4TB Internal Hard Drive HDD - 3.5 Inch 4Kn SAS 12GB/s, 7.200 RPM, 256MB Cache and 2M MTBF for Enterprise, Data Centre (ST4000NM005B)Used4 TB£222.00£55.50Enterprise HDD · SASCMREnterprise-
Toshiba N300 14TB NAS 3.5-Inch Internal Hard Drive - CMR SATA 6 Gb/s 7200 RPM 512 MB Cache - HDWG51EXZSTA14 TB£783.39£55.96NAS HDD · SATACMR-
Seagate IronWolf Pro Hard NAS SATA Internal Hard Drive 6Gb/s10 TB£563.91£56.39NAS HDD · SATACMR-
Toshiba N300 PRO 16TB Large-Sized Business NAS (up to 24 bays) 3.5-Inch Internal Hard Drive - Up to 300 TB/year Workload Rate CMR SATA 6 GB/s 7200 RPM 512 MB Cache - HDWG51GXZSTB16 TB£907.74£56.73NAS HDD · SATACMR-
Seagate IronWolf Pro ST4000NT001 3.5" 4TB SATA4 TB£228.77£57.19NAS HDD · SATACMR-
Western Digital Ultrastar DC HC310 HUS726T4TALE6L4 3.5" 4000 GB Serial ATA III4 TB£229.00£57.25Enterprise HDD · SATACMREnterprise-
WD Red Pro 4TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR, 256MB Cache4 TB£229.99£57.50NAS HDD · SATACMR-
Western Digital Ultrastar HC590 WUH722624ALE6L4 0F65684 24TB 7.2K RPM SATA 6Gb/s 512e 3.5in Enterprise Hard Drive24 TB£1,385.25£57.72Enterprise HDD · SATACMREnterprise-
Seagate IronWolf 4TB Internal Hard Drive, NAS HDD, 3.5 Inch, 5400 RPM, CMR, 256 MB Cache, SATA 6GB/s, Silver, Includes 3 Year Rescue Service, FFP, Model No.: ST4000VN0064 TB£231.69£57.92NAS HDD · SATACMR-
WD Red Pro 4TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR Recording Technology, 256MB Cache4 TB£233.25£58.31NAS HDD · SATACMR-
Seagate Exos 7E10 4TB Internal Hard Drive HDD - 3.5 Inch 512e/4Kn SAS 6GB/s, 7.200 RPM, 256MB Cache and 2M MTBF for Enterprise, Data Centre (ST4000NM000B)4 TB£235.47£58.87Enterprise HDD · SASCMREnterprise-
WD Red Pro 10TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR Recording Technology, 512MB Cache10 TB£588.69£58.87NAS HDD · SATACMR-
Toshiba MG09 Series MG09ACA14TE - Festplatte - 14 TB - intern - 3.5" (8.9 cm) - SATA 6Gb/s - 7200 rpm - Puffer: 512 MB14 TB£841.99£60.14Enterprise HDD · SATACMREnterprise-
Synology DS423 24TB 4 Bay Desktop NAS Solution installed with 4 x 6TB Seagate Ironwolf Drives24 TB£1,447.99£60.33NAS HDD · SATACMR-
Seagate Exos 7E10 4TB Internal Hard Drive HDD - 3.5 Inch 4Kn SAS 12GB/s, 7.200 RPM, 256MB Cache and 2M MTBF for Enterprise, Data Centre (ST4000NM005B)4 TB£246.29£61.57Enterprise HDD · SASCMREnterprise-
WD Red Plus 2TB NAS 3.5" Internal Hard Drive - 5400 RPM, SATA 6 Gb/s, CMR, 64MB Cache2 TB£125.39£62.70NAS HDD · SATACMRPrime
Western Digital Ultrastar DC HC555 WUH722012CLE6L4 12TB SATA Internal Hard Drive12 TB£763.06£63.59Enterprise HDD · SATACMREnterprise-
WD Red Pro 4TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR Recording Technology, 256MB Cache4 TB£255.46£63.87NAS HDD · SATACMR-
Western Digital WD30EFPX / 3 TB/Red Plus3 TB£194.99£65.00NAS HDD · SATACMR-
Toshiba N300 PRO 8TB Large-Sized Business NAS (up to 24 bays) 3.5-Inch Internal Hard Drive - Up to 300 TB/year Workload Rate CMR SATA 6 GB/s 7200 RPM 256 MB Cache - HDWG480XZSTB8 TB£522.15£65.27NAS HDD · SATACMR-
Seagate IronWolf, 2TB, Enterprise Internal NAS HDD – CMR 3.5 Inch, SATA 6 Gb/s, 5900 RPM, 256 MB Cache for RAID NAS, Rescue Services (ST2000NT003)Used2 TB£133.24£66.62NAS HDD · SATACMR-
Seagate IronWolf 2TB, Enterprise Internal NAS HDD, CMR 3.5 Inch, SATA 6GB/s, 5900 RPM, 256MB Cache for RAID NAS, Data Rescue Services, Frustration Free Packaging (ST2000VNZ03)2 TB£140.00£70.00NAS HDD · SATACMR-
Synology DS423 16TB 4 Bay Desktop NAS Solution installed with 4 x 4TB Western Digital Red Plus Drives16 TB£1,119.99£70.00NAS HDD · SATACMR-
Synology DS423 16TB 4 Bay Desktop NAS Solution installed with 4 x 4TB Seagate Ironwolf Drives16 TB£1,124.00£70.25NAS HDD · SATACMR-
Seagate EXOS 2TB Enterprise 2.5" SATA HDD/Hard Drive2 TB£145.00£72.50Enterprise HDD · SATACMREnterprise-
Seagate Technology Exos X20, 20TB, 3.5-Inch SATA Hard Drive at 6GB/s, 7,200 RPM, 2.5M MTBF, 512e and 4Kn FastFormat, Low Latency with Enhanced Cache (ST20000NM007D), Green20.2 TB£1,484.98£73.51Enterprise HDD · SATACMREnterprise-
Seagate IronWolf Pro, 2 TB, Enterprise NAS Internal HDD –CMR 3.5 Inch, SATA 6 Gb/s, 7,200 RPM, 256 MB Cache for RAID Network Attached Storage, 3 year Rescue Services (ST2000NT001)2 TB£150.00£75.00Enterprise HDD · SATACMREnterprise-
WD Red Plus 2TB NAS 3.5" Internal Hard Drive - 5400 RPM Class, SATA 6Gb/s, CMR, 64MB Cache2 TB£155.45£77.72NAS HDD · SATACMR-
Western Digital Ultrastar DC HC310 (HUS726T6TALE6L4) SATA Enterprise HDD 7200 RPM, 6 TB6 TB£476.51£79.42Enterprise HDD · SATACMREnterprise-
WD Red Plus 2TB NAS 3.5" Internal Hard Drive - 5400 RPM Class, SATA 6 Gb/s, CMR, 128MB Cache2 TB£159.06£79.53NAS HDD · SATACMR-
WD Western Digital Red Plus 3.5" 2000 GB Series ATA III2 TB£159.06£79.53NAS HDD · SATACMR-
Toshiba N300 PRO 4TB Large-Sized Business NAS (up to 24 bays) 3.5-Inch Internal Hard Drive - Up to 300 TB/year Workload Rate CMR SATA 6 GB/s 7200 RPM 256 MB Cache - HDWG440XZSTB4 TB£324.40£81.10NAS HDD · SATACMR-
Seagate IronWolf Pro 8 TB NAS Internal Hard Drive HDD – 3.5 Inch SATA 6 Gb/s 7200 RPM 256 MB Cache for RAID Network Attached Storage, Data Recovery Service (ST8000NE0004)8 TB£659.00£82.38NAS HDD · SATACMR-
Synology DS223 8TB 2 Bay Desktop NAS Solution installed with 2 x 4TB Seagate Ironwolf Drives8 TB£699.90£87.49NAS HDD · SATACMR-
Seagate Exos 7E2000 ST1000NX0423 1TB Internal Hard Drive 2.5" SFF SATA 6Gbps NL 7200RPM Buffer 128MB1 TB£100.00£100.00Enterprise HDD · SATACMREnterprise-
Seagate Exos 10E2400 ST1800MM0129 - Hybrid hard drive - 1.8 TB (16 GB Flash) - internal - 2.5" SFF - SAS 12Gb/s - 10000 rpm - buffer: 256 MB1.8 TB£180.00£100.00Enterprise HDD · SASCMREnterprise-
WD Red 4 TB NAS SSD 2.5 Inch SATAUsed4 TB£399.99£100.00NAS SSD · SATANAS-
WD Red SA500 2TB NAS SATA SSD 2.5 InchUsed2 TB£218.33£109.17NAS SSD · SATANASPrime
Western Digital WD-40 Ultrastar DC HA210, SATA 6G, 3,5 Zoll - 1 TB1 TB£112.00£112.00Enterprise HDD · SATACMREnterprise-
Synology DS423 8TB 4 Bay Desktop NAS Solution installed with 4 x 2TB Western Digital Red Plus Drives8 TB£929.00£116.13NAS HDD · SATACMR-
TOSHIBA N300 PRO 4TB Large-Sized Business NAS (up to 24 Bays) 3.5-Inch Internal Hard Drive - Up to 300 TB/Year Workload Rate CMR SATA 6 GB/s 7200 RPM 512 MB Cache - HDWG740XZSTD4 TB£477.41£119.35NAS HDD · SATACMR-
QNAP TS-233/4TB 2 Bay Dekstop NAS Unit with Seagate IronWolf Drives4 TB£529.99£132.50NAS HDD · SATACMR-
Synology DS223 4TB 2 Bay Desktop NAS Solution installed with 2 x 2TB Western Digital Red Plus Drives4 TB£539.99£135.00NAS HDD · SATACMR-
WD Red SA500 2TB NAS SATA SSD 2.5 Inch2 TB£283.98£141.99NAS SSD · SATANAS-
Gigastone 1TB NAS SSD Drive (2-Pack) 24/7 Durable TLC High Endurance RAID Data Storage Network Attached Storage 2.5" SATA Internal Solid State Hard Drives2 TB£298.90£149.45NAS SSD · SATANAS-
Gigastone 4TB NAS SSD Drive 24/7 Durable High Endurance RAID Data Storage Network Attached Storage 2.5" SATA Internal Solid State Hard Drives4 TB£598.99£149.75NAS SSD · SATANAS-
Gigastone 4TB NAS SSD Drive (2-Pack) 24/7 Durable High Endurance RAID Data Storage Network Attached Storage 2.5" SATA Internal Solid State Hard Drives8 TB£1,296.90£162.11NAS SSD · SATANAS-
WD Red SA500 4TB NAS SATA SSD 2.5 Inch4 TB£699.00£174.75NAS SSD · SATANAS-
Gigastone 2TB NAS SSD Drive (4-Pack) 24/7 Durable TLC High Endurance RAID Data Storage Network Attached Storage 2.5" SATA Internal Solid State Hard Drives8 TB£1,469.80£183.73NAS SSD · SATANAS-
Gigastone 512GB NAS SSD Drive (2-Pack) 24/7 Durable TLC High Endurance RAID Data Storage Network Attached Storage 2.5" SATA Internal Solid State Hard Drives1.02 TB£208.90£204.00NAS SSD · SATANAS-
Gigastone 512GB NAS SSD Drive 24/7 Durable TLC High Endurance RAID Data Storage Network Attached Storage 2.5" SATA Internal Solid State Hard Drives512 GB£115.99£226.54NAS SSD · SATANAS-
Gigastone 1TB NAS SSD Drive 24/7 Durable TLC High Endurance RAID Data Storage Network Attached Storage 2.5" SATA Internal Solid State Hard Drives1 TB£239.99£239.99NAS SSD · SATANAS-
WD Red SA500 NAS SATA SSD WDS400T1R0A - Solid state drive - 4 TB - internal - 2.5" - SATA 6Gb/s4 TB£969.00£242.25NAS SSD · SATANAS-
WD Red 4 TB NAS SSD 2.5 Inch SATA4 TB£999.00£249.75NAS SSD · SATANAS-
WD Red 1 TB NAS SSD 2.5 Inch SATA1 TB£250.99£250.99NAS SSD · SATANASPrime
WD Red 500 GB NAS SSD 2.5 Inch SATA500 GB£211.41£422.82NAS SSD · SATANASPrime

Prices are indicative — last checked 24 July 2026, from Amazon.co.uk. They are not live; check the current price on Amazon before buying. Best £/TB is the lowest at last check.

Frequently asked questions

How much usable storage does the F4-425 Plus give?

With 4x 8TB in RAID 5, you get roughly 22TB usable after redundancy and overhead. Change the drive size in the calculator for exact figures.

Why is usable capacity less than the total?

Two things reduce it. Redundancy hands one drive (or two for RAID 6 and SHR-2) to fault tolerance so the array survives a failure. Then drive makers count 1TB as a trillion bytes while the operating system counts in binary and the filesystem reserves a little, so real usable space is about 91 percent of the raw figure.

What RAID does the F4-425 Plus support?

The F4-425 Plus supports 7 array types, classic RAID levels. Match drive sizes, as classic RAID treats every drive as the smallest one. The calculator only lists the levels this model actually offers.

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Last updated: 2026-07-24 00:01:13 UTC. As an Amazon Associate we earn from qualifying purchases. Product prices and availability are accurate as of the date indicated on Amazon.co.uk and are subject to change. Any price displayed at the time of purchase will apply. CERTAIN CONTENT THAT APPEARS ON THIS SITE COMES FROM AMAZON SERVICES LLC. THIS CONTENT IS PROVIDED AS IS AND IS SUBJECT TO CHANGE OR REMOVAL AT ANY TIME.