Cheapest 4TB external drives from £87.47 (£21.87/TB)

£/TB	Price	Size	Tech	Form Factor	Condition	Description	Rating	Reviews
£21.87	£87.47	4 TB	HDD	External	New	ADATA HV300 4TB, 2.5" Slim External Hard Drive, USB 3.2 Gen1, AHV300-4TU31-CBK (work with PS5/XBOX) Buy	★★★★½ 4.5	229
£33.39	£133.56	4 TB	HDD	External	Warehouse	WD 4TB Elements AE Portable External Hard Drive, SuperSpeed USB 3.2 Gen 1/USB 3.0, Plug-and-Play, Formatted for Windows, Black400+ bought last month Buy	★★★★☆ 4.3	1,113
£33.71	£134.82	4 TB	HDD	External	Warehouse	Seagate 4TB Expansion Desktop Hard Drive \| USB 3.0 (STKP4000400)100+ bought last month Buy	★★★★☆ 4.3	18,797
£34.53	£138.11+0.1% 24h	4 TB	HDD	External	New	Avolusion T8 Series 4TB USB 3.0 External Gaming Hard Drive for PS5 Game Console (Black) - 2 Year Warranty★ Buy	★★★★☆ 4.0	52
£35.42	£141.66	4 TB	HDD	External	Warehouse	Toshiba Canvio Flex 4TB – Portable 2.5’’ External Hard Drive (HDD) for Mac, Windows PC, Smartphone and Tablet Use, Compatible with Most USB-C and USB-A Devices, Metallic Blue (HDTX240ESCCA) Buy	★★★★☆ 4.4	12
£35.73	£142.91	4 TB	HDD	External	New	Avolusion PRO-Z 4TB External USB 3.0 Gaming Hard Drive for PS5 Buy	★★★★☆ 4.2	192
£36.63	£146.50+1.7% 24h	4 TB	HDD	External	New	Toshiba Canvio Ready 4TB - tragbare externe 2,5-Zoll-Festplatte mit SuperSpeed USB 3.2 Gen 1, kompatibel mit Microsoft Windows 8, 10 und 11, schwarz (HDTP340EK3CA) Buy	★★★★☆ 4.4	807
£37.46	£149.83-0.2% 24h	4 TB	HDD	External	New	Seagate 4TB Portable Hard Drive \| USB 3.0 (STGX4000400)100+ bought last month Buy	★★★★½ 4.5	266,184
£37.91	£151.62	4 TB	HDD	External	New	Avolusion PRO-Z 4TB External USB 3.0 Gaming Hard Drive for Xbox Buy	★★★★☆ 4.3	149
£39.00	£155.99-14.2% 24h	4 TB	HDD	External	New	WD 4TB My Passport portable external storage, external hard drive, USB 3.0, portable HDD with software for device management, backup and password protection, works with PC, Xbox &Playstation, Blue Used £155.99 · £39.00/TB Buy	★★★★½ 4.6	105,061
£39.44	£157.77	4 TB	HDD	External	New	Seagate Expansion Portable, 4TB, External Hard Drive, 2.5 Inch, USB 3.0, for Mac and PC, 2 year Rescue Services (STKM4000400)Used £143.90 · £35.98/TB Buy	★★★★½ 4.6	33,331
£39.96	£159.84	4 TB	HDD	External	New	Verbatim Store 'n' Go - 4TB, External Hard Drive, Portable USB 3.0 Data Storage, Fast Data Transfer up to 4800 Mbit/s, black, corrugated - 53223 Buy	★★★★☆ 4.4	198
£39.99	£159.95	4 TB	HDD	External	New	Seagate Basic, 4TB, Portable External Hard Drive, USB 3.0, for PC Laptop (STJL4000400) Buy	★★★★½ 4.6	15,418
£40.05	£160.19	4 TB	HDD	External	Warehouse	LaCie 4TB Mobile Drive \| USB-C (STLP4000400)100+ bought last month Buy	★★★★½ 4.5	1,525
£41.00	£163.99	4 TB	HDD	External	New	Toshiba Canvio Partner 4TB Portable 2.5’’ External Hard Drive, USB 3.2, Mac & Windows compatible. (HDTB540EK3CB)300+ bought last month Buy	★★★★½ 4.5	12,829
£41.25	£165.00	4 TB	HDD	External	New	WD 4TB My Passport portable external storage, external hard drive, USB 3.0, portable HDD with software for device management, backup and password protection, works with PC, Xbox &Playstation, Black Buy	★★★★½ 4.6	105,061
£41.91	£167.64+9.6% 24h	4 TB	HDD	External	New	TOSHIBA Canvio Basics 4TB Portable External Hard Drive USB 3.0, Black Buy	★★★★½ 4.6	1,282
£42.00	£168.00+0.6% 24h	4 TB	HDD	External	New	WD My Passport 4TB Portable External Hard Drive, USB 3.2 Gen 1, Red Buy	★★★★½ 4.6	105,061
£42.49	£169.95	4 TB	HDD	External	New	WD 4 TB Elements Portable External Hard Drive - USB 3.0, Black, USB 3.0, Plug-and-Play, formatted for Windows, SchwarzBestsellerUsed £159.00 · £39.75/TB Buy	★★★★½ 4.7	287,087
£42.50	£169.99	4 TB	HDD	External	New	WD_BLACK P10 4TB Game Drive, Portable External Hard Drive, Speeds Up to 130 MB/s, USB 3.2 Gen 1, Works with Playstation, Xbox, PC, Includes One Month Discord NITRO offer, Camo Buy	★★★★☆ 4.4	53
£42.50	£169.99	4 TB	HDD	External	New	Toshiba Canvio Gaming 4TB – Portable 2.5’’ External Hard Drive compatible with most PlayStation, Xbox and PC consoles, USB 3.2. Gen 1 Technology, Black (HDTX140EK3CA) Buy	★★★★½ 4.5	296
£42.50	£169.99	4 TB	HDD	External	New	WD_BLACK P10 4TB Game Drive, Portable External Hard Drive for On-The-Go Access to Your Game Library, Works with Playstation, Xbox, PC, Save up to 150 games, Includes One Month Discord NITRO offer-PINK Buy	★★★★½ 4.6	24,779
£42.50	£169.99	4 TB	HDD	External	New	WD 4TB My Passport Ultra, portable external storage, external hard drive, software with defense against ransomware, backup and password protection, Works with PC, Xbox S\|X, Playstation, Silver Buy	★★★★½ 4.5	11,172
£43.14	£172.54-0.6% 24h	4 TB	HDD	External	New	LaCie Rugged Mini 4TB Portable Hard Drive \| USB 3.0 (LAC9000633)100+ bought last month Buy	★★★★½ 4.5	23,552
£43.25	£172.99	4 TB	HDD	External	New	Toshiba Canvio Flex 4TB Portable External Hard Drive Silver Buy	★★★★½ 4.6	509
£45.85	£183.41	4 TB	HDD	External	New	Toshiba Canvio Advance 4TB Portable External Hard Drive USB 3.0, Black - HDTCA40XK3CA Buy	★★★★½ 4.6	9,251
£45.90	£183.59	4 TB	HDD	External	New	Toshiba Canvio Advance 4TB Portable External Hard Drive USB 3.0, Green - HDTCA40XG3CA Buy	★★★★½ 4.6	9,251
£46.25	£184.99	4 TB	HDD	External	New	WD 4TB My Passport for Mac portable external storage, USB 3.0, Mac Compatible external hard drive, software for device management, backup and password protection, Time Machine Ready, Midnight Blue Buy	★★★★☆ 4.3	6,665
£46.25	£184.98+0.0% 24h	4 TB	HDD	External	New	Toshiba Canvio Basics 4TB Portable External Hard Drive USB 3.0, Black - HDTB540XK3CA Buy	★★★★½ 4.6	13,670
£47.50	£189.99	4 TB	HDD	External	New	WD 4TB My Passport Works with USB-C, portable external hard drive, USB 3.2 Gen 1, software for device management, backup, password protection, Works with PC, Mac, Chromebook, Gaming Consoles, Grey Buy	★★★★☆ 4.3	893
£47.76	£191.05	4 TB	HDD	External	New	Seagate Expansion Desktop, 4TB, External Hard Drive, USB 3.0, 2 year Rescue Services (STKP4000402) Buy	★★★★½ 4.7	22,353
£47.98	£191.90+0.8% 24h	4 TB	HDD	External	New	Toshiba Canvio Advance external hard drive 4 TB Red Buy	★★★★½ 4.6	184
£49.25	£196.99	4 TB	HDD	External	New	Seagate One Touch 4TB External Hard Drive Buy	★★★★☆ 4.4	2,487
£49.25	£196.99	4 TB	HDD	External	New	LaCie 4TB Rugged Portable Hard Drive \| USB-C (STFR4000800)Bestseller Buy	★★★★½ 4.5	8,303
£49.75	£199.00	4 TB	HDD	External	New	WD 4TB My Passport Portable Gaming Storage for PlayStation 4 - Black Buy	★★★★☆ 4.2	221
£50.10	£200.39	4 TB	HDD	External	New	G-DRIVE ArmorATD 4TB, portable rugged external hard drive, HDD up to 130 MB/s, USB-C (5Gbps), USB 3.2 Gen 1, Thunderbolt 3 Buy	★★★★☆ 4.0	1,558
£50.56	£202.24	4 TB	HDD	External	New	TOSHIBA Canvio Advance 4TB Portable External Hard Drive USB 3.0, White - HDTCA40XW3CA Buy	★★★★½ 4.6	9,251
£52.10	£208.39-5.3% 24h	4 TB	HDD	External	New	WD_BLACK P10 4TB Game Drive for Xbox, storage expansion, Portable external hard drive, On-the-Go Access to your Library, up to 130 MB/s, Includes 1 month Xbox Pass Ultimate Buy	★★★★☆ 4.4	1,784
£52.33	£209.31-1.9% 24h	4 TB	HDD	External	New	ADATA HV620S 4TB, Slim External Hard Drive, 2.5", USB 3.2 Gen1, 11.5mm Thick, Black - AHV620S-4TU31-CBK (work with PS5/XBOX) Buy	★★★★½ 4.6	467
£52.50	£209.99	4 TB	HDD	External	New	Seagate Expansion 4 TB 2.5-Inch USB 3.0 Portable External Hard Drive for PC and Xbox One, 4TB Buy	★★★★½ 4.7	64,717
£54.32	£217.27	4 TB	HDD	External	New	WD_BLACK P10 4TB Game Drive, portable external HDD, works with Playstation, Xbox, PC, & Mac, save up to 125 games Used £169.00 · £42.25/TB Buy	★★★★½ 4.7	5,126
£55.25	£221.00+0.5% 24h	4 TB	HDD	External	New	BUFFALO 4TB MiniStation PGF Portable External Hard Drive HDD Shock Resistant, USB 3.0 (3.2 Gen 1x1) for PC, Mac Buy	★★★★☆ 4.4	17
£56.25	£224.99	4 TB	HDD	External	New	LaCie 4TB d2 Professional \| USB-C (STHA4000800) Buy	★★★★☆ 4.4	1,831
£57.25	£228.99	4 TB	HDD	External	New	Seagate Ultra Touch HDD 4TB, External HDD, Pebble Grey, Post-Consumer Recycled material, USB-C compatibility with PC, Mac & Chromebook, Data Rescue Services (STMA4000400) Buy	★★★★☆ 4.3	1,149
£61.59	£246.35	4 TB	HDD	External	New	Seagate One Touch 4To External HDD Buy	★★★★☆ 4.4	2,487
£61.86	£247.44-1.2% 24h	4 TB	HDD	External	New	Seagate Game Drive for Xbox, 4TB, External Hard Drive Portable, USB 3.2 Gen 1, Black with built-in green LED bar, Xbox Certified, 3 year Rescue Services (STKX4000402) Buy	★★★★½ 4.5	7,213
£62.92	£251.67	4 TB	HDD	External	New	SanDisk Professional 4TB G-DRIVE ArmorATD, Dust, Drop, Shock and Water resistant, portable rugged external HDD for MAC, Up to 135MB/s, USB-C, USB 3.2 Gen 1, Thunderbolt 3 Buy	★★★★☆ 4.3	2,278
£63.25	£252.99	4 TB	HDD	External	New	Transcend 4TB StoreJet 25H3 Rugged Portable HDD, One Touch Backup Buy	★★★★☆ 4.4	6,561
£63.75	£254.99	4 TB	HDD	External	New	Transcend 4TB StoreJet 25M3 Rugged Portable HDD, One Touch Backup Buy	★★★★½ 4.5	842
£64.35	£257.41	4 TB	HDD	External	New	LaCie Mobile Drive, 4TB , External Hard Drive, Moon Silver, USB-C, PC Mac iPad & iPhone, Data Rescue Service (STHG4000400) Buy	★★★★½ 4.5	5,962
£66.62	£266.47	4 TB	HDD	External	New	Toshiba Canvio Basics 4TB Portable External Hard Drive USB 3.0, Black - HDTB440XK3CA Buy	★★★★½ 4.7	11,203
£66.93	£267.71	4 TB	HDD	External	New	iDiskk Mfi Certified 4TB External Hard Drive for iPhone & iPad, Android Mobile, MacBook and Windows PC, Backup Photos/Videos, Files Buy	★★★★☆ 4.2	635
£67.72	£270.89	4 TB	HDD	External	New	WD 4TB Elements External Hard Drive, Desktop HDD storage, USB 3.0 compatible, Fast Transfer rates, Easy add on storage for all your pictures, videos, music and documents, Black Buy	★★★★½ 4.6	19,815
£69.24	£276.96	4 TB	HDD	External	New	WD 4TB My Passport Ultra, portable external storage, external hard drive, software with defense against ransomware, backup and password protection, Works with PC, Xbox S\|X, PS5, PS4, Midnight Blue Buy	★★★★½ 4.5	11,172
£71.75	£287.00-1.0% 24h	4 TB	HDD	External	New	Seagate Expansion Desktop 4TB External Hard Drive HDD – USB 3.0 for PC Laptop (STEB4000100) Buy	★★★★½ 4.5	21,446
£72.24	£288.97	4 TB	SSD	External	Warehouse	Crucial X10 4TB External Portable SSD Drive - Up to 2100MB/s, USB-C 3.2 Gen2, IP65 Dust and Water Resistant, External Solid State Drive, Matte Blue - CT4000X10SSD9-02100+ bought last month Buy	★★★★☆ 4.3	2,590
£75.13	£300.53	4 TB	HDD	External	New	Silicon Power Armor A60 External Disk 4TB 2.5" USB 3.2 5400 RPM Black Buy	★★★★☆ 4.0	1
£76.25	£305.00+1.0% 24h	4 TB	HDD	External	New	BUFFALO LinkStation 220 4TB 2-Bay NAS Network Attached Storage with HDD Hard Drives Included NAS Storage That Works as Home Cloud or Network Storage Device for Home Buy	★★★★☆ 4.1	701
£77.29	£309.16	4 TB	HDD	External	New	TOSHIBA Canvio Flex 4TB Portable External Hard Drive USB-C USB 3.0, Silver for PC, Mac, & Tablet - HDTX140XSCCA Buy	★★★★½ 4.6	8,148
£78.84	£315.35	4 TB	SSD	External	Warehouse	Crucial X9 4TB Portable External SSD - Up to 1050MB/s, External Solid State Drive, Works with PlayStation, Xbox, PC and Mac, USB-C 3.2 - CT4000X9SSD902200+ bought last month Buy	★★★★☆ 4.4	8,182
£80.99	£323.97	4 TB	HDD	External	New	WD 4TB My Book external hard drive, Desktop HDD with Password Protection, USB 3.0, SuperSpeed USB, software for device management, backup, hardware encryption, Black Buy	★★★★½ 4.5	4,128
£81.31	£325.23-0.4% 24h	4 TB	HDD	External	New	TOSHIBA Canvio Advance 4TB Portable External Hard Drive USB 3.0, Red - HDTCA40XR3CA Buy	★★★★½ 4.6	9,249
£82.35	£329.38	4 TB	HDD	External	New	Western Digital My Passport 4 TB Portable Hard Drive and Auto Backup Software for PC, Xbox One and PlayStation 4 - Black Buy	★★★★½ 4.6	3,756
£83.95	£335.81-0.0% 24h	4 TB	HDD	External	New	WD 4 TB My Passport for Mac Portable Hard Drive - Black Buy	★★★★☆ 4.4	2,227
£86.55	£346.19-0.6% 24h	4 TB	HDD	External	New	Western Digital 4TB My Book Desktop External Hard Drive, USB 3.0, External HDD with Password Protection and Backup Software - WDBBGB0040HBK-NESN Buy	★★★★☆ 4.4	11,264
£88.01	£352.02	4 TB	HDD	External	New	WD 4TB My Passport Ultra for Mac, portable external hard drive, USB-C, Mac Compatible, portable external storage, software with defense against ransomware, backup and password protection, Silver Buy	★★★★☆ 4.2	4,627
£88.50	£354.00	4 TB	HDD	External	New	Silicon Power 4 TB External Portable Hard Drive Rugged Armor A60 Shockproof Water-Resistant 2.5 Inch USB 3.0 , Military Grade MIL-STD-810G & IPX4, for PC/Mac/Xbox One/Xbox 360/PS4/PS4 Pro/PS4, Black Buy	★★★★☆ 4.2	199
£97.24	£388.95	4 TB	HDD	External	New	WD 4TB Gaming Drive Portable HDD works with Playstation 4 Buy	★★★★½ 4.7	6,272
£98.22	£392.86	4 TB	SSD	External	Warehouse	SanDisk Extreme Portable SSD 4TB - Up to 1050MB/s Read Speeds (Older Model)200+ bought last month Buy	★★★★½ 4.5	4,388
£102.50	£409.99	4 TB	SSD	External	New	fanxiang 4TB Portable External SSD, USB-C USB 3.2 Gen2, Up to 2000MB/s Buy	★★★★☆ 4.2	1,042
£103.01	£412.05	4 TB	NVMe SSD	External	New	WD 4TB My Passport Portable SSD, External NVMe Solid State Drive, USB-C, up to 1050 MB/s, Works with PC, Xbox and Playstation, 2-meters drop resistance, Space Grey Buy	★★★★½ 4.5	9,662
£105.00	£419.99	4 TB	SSD	External	New	SanDisk 4TB Creator Desk Drive SSD, Up to 1000 MB/s Read Speeds Buy	★★★★★ 5.0	5
£108.74	£434.94	4 TB	SSD	External	New	Crucial X6 4TB Portable SSD - up to 800MB/s - PC and Mac - USB 3.2 USB-C External Solid State Drive, CT4000X6SSD9 Buy	★★★★½ 4.5	35,047
£112.00	£447.99	4 TB	SSD	External	New	SanDisk 4TB Extreme Portable SSD - Up to 1050MB/s - USB-C, USB 3.2 Gen 2 - External Solid State Drive - SDSSDE61-4T00-G25B Buy	★★★★½ 4.6	2,445
£114.25	£457.01	4 TB	HDD	External	New	WD Easystore 4TB External USB 3.0 Portable Hard Drive - Black (WDBKUZ0040BBK-WESN) Buy	★★★★☆ 4.1	71
£120.00	£479.99	4 TB	SSD	External	New	Lexar ES5 Portable SSD 4TB, up to 2000MB/s R/W, Magsafe External SSD Buy	★★★★½ 4.5	355
£120.58	£482.32+2.7% 24h	4 TB	SSD	External	New	SanDisk Extreme Portable SSD 4TB - Up to 1050MB/s Read Speeds (Older Model)100+ bought last month Buy	★★★★½ 4.6	76,059
£124.75	£499.00	4 TB	SSD	External	New	SanDisk Desk Drive SSD 4TB, Up to 1000MB/s Read Speeds Buy	★★★★☆ 4.2	179
£126.77	£507.08	4 TB	SSD	External	New	LaCie Rugged Mini SSD 4TB — shock‑resistant, USB‑C Portable External SSD, for Mac & Windows — Rescue Data Recovery included Buy	★★★★½ 4.5	316
£128.75	£514.99	4 TB	NVMe SSD	External	New	Acer Predator GM7000 4TB SSD, PCIe Gen4x4 NVMe M.2 SSD with DRAM Cache, Up to 7400 MB/s, PCIe 4.0 Internal Gaming Solid State Drive for PS5 Storage Expansion Buy	★★★★½ 4.7	3,167
£128.92	£515.69-0.1% 24h	4 TB	HDD	External	New	iStorage diskAshur3 HDD 4TB Black - Secure portable hard drive - Password protected - Dust & water resistant - Hardware Encryption Buy	★★★★★ 5.0	4
£129.75	£519.00	4 TB	HDD	External	New	Synology BeeStation 4TB USB C 3.2 External Portable HDD Buy	★★★★☆ 4.0	159
£130.25	£520.98	4 TB	HDD	External	New	iStorage diskAshur2 HDD 4TB Red - Secure portable hard drive - Password protected - Dust & water resistant - Hardware Encryption Buy	★★★★☆ 4.3	261
£130.42	£521.69	4 TB	NVMe SSD	External	New	Acer Predator GM7000 Heatsink 4TB SSD, PCIe Gen4x4 NVMe M.2 SSD with DRAM Cache, Up to 7400 MB/s, PCIe 4.0 Internal Gaming Solid State Drive for PS5 Storage Expansion Buy	★★★★½ 4.6	145
£131.75	£526.99	4 TB	SSD	External	New	Acer Predator GP30 External SSD 4TB, Up to 2000 MB/s Read, USB 3.2 Gen2 Portable Solid State Drive with Dynamic RGB Lighting for Smartphones, Tablets, PC and PS5 Buy	★★★★☆ 4.4	155
£133.75	£535.00-0.6% 24h	4 TB	SSD	External	New	SanDisk Extreme PRO Portable SSD 4TB, Up to 2000MB/s Read Speeds, MontereyBestseller Buy	★★★★½ 4.8	112
£135.90	£543.60+2.7% 24h	4 TB	SSD	External	New	SanDisk 4TB Extreme PRO Portable SSD - Up to 2000MB/s Read Speeds - Black200+ bought last month Buy	★★★★☆ 4.4	10,677
£137.38	£549.53	4 TB	SSD	External	New	SanDisk Creator PRO Portable SSD 4TB, Up to 2000MB/s Read Speeds Buy	★★★★½ 4.7	56
£141.32	£565.26	4 TB	HDD	External	New	Synology BeeStation Desktop NAS 4TB GbE LAN USB-C Buy	★★★★☆ 4.0	279
£142.27	£569.08	4 TB	SSD	External	New	Samsung Portable SSD T5 EVO, 4 TB, USB 3.2 Gen. 1, 460 MB/s read, 460 MB/s write, External hard drive for Mac, PC, Android, Smart TVs and game consoles, Incl. USB-C cable, MU-PH4T0S/EU Buy	★★★★☆ 4.4	648
£142.86	£571.42	4 TB	NVMe SSD	External	New	WD_BLACK 4TB P50 Game Drive SSD USB-C USB 3.2 Gen 2x2 External NVMe Solid State Drive up to 2000 MB/s works with Playstation, Xbox, PC, & Mac Buy	★★★★½ 4.6	1,677
£143.50	£574.00	4 TB	SSD	External	New	Kingston XS2000 4TB External SSD USB 3.2 Gen 2 Portable Solid State Drive -SXS2000/4000G Buy	★★★★½ 4.5	3,946
£150.00	£599.99	4 TB	SSD	External	New	OSCOO 4TB Portable SSD Up to 2000MB/s USB 3.2 Gen 2x2 External Solid State Drive Dual USB-C&A Compatible with iPhone 16/17/18, Android, Mac, Laptops, Tablets, Smart TVs, Cameras, Game Consoles★ Buy	★★★★☆ 4.4	177
£157.44	£629.76	4 TB	SSD	External	Warehouse	SANDISK Extreme Portable SSD 4TB, Up to 2000MB/s Transfer Speed(New Model) Buy	★★★★½ 4.6	196
£158.75	£634.99	4 TB	NVMe SSD	External	New	WD_BLACK SN850X NVMe SSD 4TB (Up to 7,300 MB/s read speed, Up to 6,600 MB/s write speed, M.2 2280, PCIe Gen4, Gaming Storage Expansion, High Performance Internal solid state drive) POWERED BY SANDISK Buy	★★★★½ 4.7	17,573
£159.17	£636.67	4 TB	SSD	External	New	External SE880 4 TB, External SSD Blue, USB-C 3.2 Gen 2x2 (20 Gbit/s) Buy	★★★★★ 5.0	1
£162.94	£651.76+0.0% 24h	4 TB	SSD	External	New	ADATA SE880 4 TB, external SSD grey, USB-C 3.2 Gen 2x2 (20 Gbit/s) Buy	★★★★★ 5.0	1
£170.50	£682.00	4 TB	SSD	External	New	Crucial X10 4TB External Portable SSD Drive - Up to 2100MB/s, USB-C 3.2 Gen2, IP65 Dust and Water Resistant, External Solid State Drive, Black - CT4000X10SSD9C02 Buy	★★★★☆ 4.3	2,590
£179.62	£718.49-4.5% 24h	4 TB	SSD	External	New	Samsung T7 Shield Portable SSD 4 TB - USB 3.2 Gen.2 External SSD Black (MU-PE4T0S/EU) Buy	★★★★½ 4.6	10,580
£187.50	£749.99	4 TB	SSD	External	New	SanDisk Extreme PRO Portable SSD 4TB, Up to 3,800MB/s Read Speeds, USB4Bestseller Buy	★★★★½ 4.6	487

4TB external drives: where desktop drives take over

4TB external is the first size where a mains-powered desktop drive (WD Elements Desktop, Seagate Expansion Desktop) is clearly cheaper per terabyte than a portable one — but 4TB portables (My Passport, Seagate Portable) still exist for people who need to carry it. The table above ranks both by real £/TB.

Desktop 4TB HDD: the value pick for a backup drive that lives on a desk.
Portable 4TB HDD: the largest common bus-powered size; slightly more per terabyte, no power brick.
4TB external SSD: a premium option for fast, portable working storage.

See all 4TB drives for internal options, or 6TB external drives if you expect to outgrow 4TB.

Frequently asked questions

How does disks.co.uk rank 4TB external drives?

We rank every 4TB external drives by real cost per terabyte (£/TB) — the live Amazon.co.uk price divided by capacity — so the best value appears at the top. Prices refresh several times a day from Keepa, with 24-hour movement and all-time-low flags.

What is the cheapest 4TB external drives option right now?

The top of the table above is the cheapest of the 4TB external drives by £/TB today. Desktop (mains-powered) external hard drives are usually the cheapest per terabyte; portable bus-powered drives and external SSDs cost more but need no power cable and survive being carried around.

Should I buy an external hard drive or an external SSD?

For backups and media a hard drive gives far more terabytes per pound. Choose an external SSD if you will work directly off the drive (video editing, games), need shock resistance, or want it fast and pocketable — see SSD vs HDD.

Is an internal drive cheaper than an external one at this size?

Often, yes — an external enclosure adds cost. If you can fit a drive inside a PC or NAS, compare the internal listings on the full capacity page before paying for the USB case. If you need plug-and-play on a laptop, Mac or console, external is the right choice.

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

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