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Cheapest 18TB drives ranked by price

The cheapest 18TB 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
£22.17 £399.00+6.1% 24h18 TBHDDExternalNew
WD 18TB My Book external hard drive, Desktop HDD with Password Protection, USB 3.0, SuperSpeed USB, software for device management, backup, hardware encryption, works with PC and Mac, Black Buy
£22.22£399.9918 TBHDDExternalNew
WD 18TB Elements Desktop External Hard Drive - USB 3.0, Black Buy
£27.50£495.0018 TB3.5"Used
Seagate Enterprise 3.5" 18000 GB 7200 RPM 18 TB 3.5" 7200 RPM SATA ST18000NM00J (Renewed) Buy
£29.98£539.6718 TB3.5"Used
Seagate IronWolf PRO 18TB Interne Festplatte CMR 3.5 Zoll SATA III 256 MB, ST18000NE000 (Renewed) Buy
£30.00£540.0018 TBHDDNew
Seagate Exos X18 Enterprise Class, 18TB, Enterprise Internal Hard Drive, SATA, 3,5" 6Gbit/s, 128MB cache ((ST18000NM000J) Buy
£30.56£549.9918 TBHDDExternalNew
G-DRIVE 18TB Enterprise-Class Desktop Hard Drive, up to 270MB/s USB-C (5Gbps), USB 3.2 Gen 1 Buy
£31.11£560.0018 TBHDD3.5"Used
Seagate IronWolf Pro 18TB NAS HDD, ST18000NE000 SATA 6Gb/s 3.5" (Renewed) Buy
£31.94£575.0018 TBHDD3.5"Used
Seagate IronWolf Pro 18TB ST18000NT001 Interne NAS Festplatte 3.5 Zoll HDD, Serial ATA III, 7200RPM, 256MB Cache (Renewed) Buy
£33.06£595.0018 TBHDD3.5"New
Toshiba 18TB Enterprise Internal Hard Drive – MG Series 3.5" SATA HDD for Server, Storage, 24/7 Operation, Hyperscale, Cloud (MG09ACA18TE) Buy
£33.11£595.9918 TBHDD3.5"New
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 PC Buy
£45.56 £820.00+14.4% 24h18 TBHDD3.5"New
WD Red Pro 18TB NAS 3.5" Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, CMR Recording Technology, 512MB Cache Buy
£66.67£1,199.9918 TBHDD3.5"New
Toshiba N300 18TB Internal NAS Hard Drive, 3.5’’ SATA HDD, 7200 RPM, 24/7 Operation, Supports 1-8 bay systems, 512MB Cache, 180TB/Year workload, 3yr Warranty (HDWG51JUZSVA). Buy