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Cheapest 4TB external hard drives & SSDs ranked by price per terabyte

Every 4TB external drive on Amazon.co.uk — desktop and portable hard drives plus external SSDs — ranked by real cost per terabyte (£/TB) from Keepa price history. Plug-and-play over USB, no fitting. Prices update daily with 24-hour movement and all-time-low flags; compare against all 4TB drives or all external drives.

last updated: 2026-10-23 09:03:22
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£/TB Price Size Tech Form Factor Condition Description Rating Reviews
TOSHIBA Canvio Advance 4TB Portable External Hard Drive USB 3.0, Red - HDTC940XR3CA£189.28£757.114 TBHDDExternalNew
TOSHIBA Canvio Advance 4TB Portable External Hard Drive USB 3.0, Red - HDTC940XR3CA Buy
★★★★½ 4.710,681
Lexar SL500 Portable Solid State Drive 4TB Up to 2000MB/s Read Compatible with Type C Laptops, iPhone 15, Smartphones, Tablets, PS5, Xbox, USB 3.2 Gen 2x2, Slim and Lightweight, SSD£189.96 £759.84-0.1% 24h4 TBSSDExternalNew
Lexar SL500 Portable Solid State Drive 4TB Up to 2000MB/s Read Compatible with Type C Laptops, iPhone 15, Smartphones, Tablets, PS5, Xbox, USB 3.2 Gen 2x2, Slim and Lightweight, SSD Buy
★★★★½ 4.636
Corsair EX400U SURVIVOR 4TB USB4 External SSD – Up to 4000 MB/s, IP55 Rugged Drive, Plug & Play for PC, Mac & iPad – Black£194.05 £776.19-0.0% 24h4 TBSSDExternalNew
Corsair EX400U SURVIVOR 4TB USB4 External SSD – Up to 4000 MB/s, IP55 Rugged Drive, Plug & Play for PC, Mac & iPad – Black Buy
★★★★½ 4.667
Samsung T9 Portable SSD 4TB, Up to 2,000MB/s, USB 3.2 Gen 2x2 External Solid State Drive, Up to 3 m drop resistant, for Creative professionals, YouTubers, Content creators, Mac compatible, MU-PG4T0B£200.00£799.994 TBSSDExternalNew
Samsung T9 Portable SSD 4TB, Up to 2,000MB/s, USB 3.2 Gen 2x2 External Solid State Drive, Up to 3 m drop resistant, for Creative professionals, YouTubers, Content creators, Mac compatible, MU-PG4T0B Buy
★★★★½ 4.72,219
SSK Portable SSD 4TB External Solid State Hard Drive USB C Up to 1050MB/s£205.57£822.274 TBSSDExternalNew
SSK Portable SSD 4TB External Solid State Hard Drive USB C Up to 1050MB/s Buy
★★★★½ 4.5564
Samsung Portable SSD T7, 4TB, Titan Gray, USB3.2, Type-C, R/W(Max) 1,050MB/s, Aluminium Case, 3 Years Warranty (MU-PC4T0T/WW)£223.47 £893.89+49.9% 24h4 TBSSDExternalNew
Samsung Portable SSD T7, 4TB, Titan Gray, USB3.2, Type-C, R/W(Max) 1,050MB/s, Aluminium Case, 3 Years Warranty (MU-PC4T0T/WW) Buy
★★★★½ 4.740,989
Amazon Product Name: Sonnet Echo 13 Thunderbolt 5 [4TB] SSD Dock-Storage NVMe6000MB/s Embedded Storage, 4 Thunderbolt 5 Ports, 4 USB-A, 2.5Gb Ethernet, 8K Display-Mac,Windows, Chromebook, iPad Pro£228.87£915.494 TBNVMe SSDExternalNew
Amazon Product Name: Sonnet Echo 13 Thunderbolt 5 [4TB] SSD Dock-Storage NVMe6000MB/s Embedded Storage, 4 Thunderbolt 5 Ports, 4 USB-A, 2.5Gb Ethernet, 8K Display-Mac,Windows, Chromebook, iPad Pro Buy
★★★★☆ 4.413
DATO 4TB External SSD, ARES Amber Shield Portable SSD w/LED, Up to 1600/1500 MB/s, OTG-Supported, Waterproof USB 3.2 Gen 2x2 Type C Rugged External Solid State Drive£231.60£926.404 TBSSDExternalNew
DATO 4TB External SSD, ARES Amber Shield Portable SSD w/LED, Up to 1600/1500 MB/s, OTG-Supported, Waterproof USB 3.2 Gen 2x2 Type C Rugged External Solid State Drive Buy
★★★★☆ 4.3166
Transcend 4TB ESD360C Portable SSD Up to 2000MB/s USB3.2 Gen2x2, Type-C£238.02£952.094 TBSSDExternalNew
Transcend 4TB ESD360C Portable SSD Up to 2000MB/s USB3.2 Gen2x2, Type-C Buy
★★★★☆ 4.015
OWC Express 1M2 Portable SSD NVMe Thunderbolt Enclousure 40Gbps USB-C USB4 Ultra Fast up to 3836MB/s real-world performance External SSD Drive with Aluminum Heat Sink - Works with PC & Mac (4TB)£244.50£977.994 TBNVMe SSDExternalNew
OWC Express 1M2 Portable SSD NVMe Thunderbolt Enclousure 40Gbps USB-C USB4 Ultra Fast up to 3836MB/s real-world performance External SSD Drive with Aluminum Heat Sink - Works with PC & Mac (4TB) Buy
★★★★½ 4.6905
SanDisk Extreme PRO Portable SSD 4TB, Up to 4000MB/s Read Speeds(New Model)£245.25£980.994 TBSSDExternalNew
SanDisk Extreme PRO Portable SSD 4TB, Up to 4000MB/s Read Speeds(New Model)★ Buy
★★★★★ 5.04
SanDisk Professional PRO-G40 Portable SSD 4TB (up to 3000 MB/s, Solid State Drive, Thunderbolt 3 (40Gbps), USB-C (10Gbps), Ultra-rugged IP68 dust/water resistance. Formatted exFAT)£378.14£1,512.564 TBSSDExternalNew
SanDisk Professional PRO-G40 Portable SSD 4TB (up to 3000 MB/s, Solid State Drive, Thunderbolt 3 (40Gbps), USB-C (10Gbps), Ultra-rugged IP68 dust/water resistance. Formatted exFAT) Buy
★★★★☆ 4.356
Corsair EX400U 4TB Portable External Type-C SSD –, USB 3.2 Gen2 2x2 Connections, Up to 40Gbps, Plug and Play, MagSafe, Includes USB-C to USB-C Cable – Windows PC, iOS Mac – Grey£397.50£1,589.994 TBSSDExternalNew
Corsair EX400U 4TB Portable External Type-C SSD –, USB 3.2 Gen2 2x2 Connections, Up to 40Gbps, Plug and Play, MagSafe, Includes USB-C to USB-C Cable – Windows PC, iOS Mac – Grey Buy
★★★★☆ 4.2406
iStorage diskAshur2 SSD 4TB Red - Secure portable solid state drive - Password protected - Dust & water resistant - Hardware Encryption£462.25 £1,848.99-0.2% 24h4 TBSSDExternalNew
iStorage diskAshur2 SSD 4TB Red - Secure portable solid state drive - Password protected - Dust & water resistant - Hardware Encryption Buy
★★★★☆ 4.173
LaCie Rugged SSD4 4TB — shock‑resistant, USB‑C Portable External SSD, for Mac & Windows — Rescue Data Recovery included£864.25 £3,457.01-0.3% 24h4 TBSSDExternalNew
LaCie Rugged SSD4 4TB — shock‑resistant, USB‑C Portable External SSD, for Mac & Windows — Rescue Data Recovery includedUsed £1,049.99 · £262.50/TB Buy
★★★★½ 4.835