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Cheapest 20TB drives ranked by price

The cheapest 20TB hard drives and SSDs on Amazon.co.uk right now, ranked by price per terabyte (£/TB). Larger capacities usually give better £/TB, so it is worth comparing against nearby sizes before you buy. Prices update daily with 24-hour movement and all-time-low flags.

last updated: 2026-07-19 20:12:34
£/TB Price Size Tech Form Factor Condition Description
£21.80 £436.00+2.1% 24h20 TBHDDExternalNew
Seagate Expansion Desktop 20TB, External Hard Drive, USB 3.0, Data Rescue Services (STKP20000400) Buy
£24.17£483.4620 TBHDDExternalNew
WD 20TB Elements External Hard Drive, Desktop HDD storage, USB 3.0 compatible, Fast Transfer rates, Plug-and-play storage for all your pictures, videos, music and documents, Black Buy
£29.58£591.5220 TBHDDExternalNew
Seagate One Touch Hub 20TB, External Hard Drive Desktop HDD, USB-C & USB 3.0 port, for Computer Desktop Workstation PC Laptop Mac (STLC20000400) Buy
£30.43£608.6120 TBHDD3.5"New
Seagate IronWolf Pro, NAS Internal Hard Drive 20TB HDD, 3.5 Inch, 7200 rpm, CMR, 256 MB Cache, SATA 6GB/S, Silver, Model No.: ST20000NE000 Buy
£33.75£675.0020 TBHDD3.5"New
Seagate IronWolf Pro ST20000NE00 RV sensor 8.9 cm (3.5") NAS 20TB HDD (CMR) Buy
£34.23 £684.50-0.1% 24h20 TBHDD3.5"New
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) Buy
£34.75£695.0020 TBHDD3.5"New
ST20000NE000 20TB, NAS Internal Hard Drive, 3.5 Inch, 7200 rpm, CMR, 256 MB Cache, SATA 6 GB/S Buy
£36.45£728.9520 TBHDDExternalNew
WD 20TB My Book Duo Desktop HDD USB 3.1 Gen 1 with software for device management, backup and password protection USB-C and USB-A cables RAID 0/1, JBOD Buy
£36.80£735.9920 TBHDD3.5"New
Toshiba 20TB Enterprise Internal Hard Drive – MG Series 3.5" SATA HDD for Server, Storage, 24/7 Operation, Hyperscale, Cloud (MG10ACA20TE) Buy
£47.75 £954.91+8.5% 24h20 TBHDD3.5"New
WD Red Pro 20TB NAS 3.5" Internal Hard Drive - 7200 RPM, SATA 6 Gb/s, CMR, 512MB Cache Buy
£55.79£1,115.7620 TBHDD3.5"New
WD Red Pro 20TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR Recording Technology, 512MB Cache Buy
£74.25£1,484.9820 TBHDD3.5"New
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), Green Buy