External Hard Drive Deals UK 2026: Prime Big Deal Days Offers

· Prime Big Deal Days has ended; the prices below are still live.

As an Amazon Associate we earn from qualifying purchases. Prices and availability shown are from Amazon.co.uk at the last update and may change.

Amazon is flagging 63 offers on this selection right now. The cheapest new price per TB on this page is £11.89/TB, on the TRyYCB Portable 1TB External Hard Drive.

We track 133 in-stock listings for this selection on Amazon.co.uk. Offers below are shown as Amazon states them, then compared with the cheapest listings by £/TB.

Deals Amazon is flagging

In-stock listings where Amazon shows a deal badge, a Prime-exclusive offer, a list price above the current price or low stock. Sorted by Amazon’s stated saving in pounds. We add no verdict. Showing the first 60 of 63.

New

ProductCapacityPriceAmazon’s list priceAmazon’s stated saving£/TBConditionSold byBuy
Seagate 4TB Expansion Portable Hard Drive | MicroB to USB-C (STNN4000400) | Everyday HDD storage. Effortless backup. Windows & macOS. Lightweight & travel-ready. 2-Year Warranty + 2-Year Rescue4 TB£150.99£218.73Was£67.7431%£37.75NewAmazonPrimeBuy on Amazon
LaCie 5TB Mobile Drive Secure | USB-C (STLR5000400) | Premium portable HDD, 5Gbps password encryption. Adobe CC trial included. 3-Year Warranty + 3-Year Rescue5 TB£189.97£237.99RRP£48.0220%£37.99NewAmazonPrimeBuy on Amazon
Seagate 5TB Portable Hard Drive | USB 3.0 (STGX5000400) | Everyday HDD storage. Plug-and-play backup. Windows & macOS. Adobe CC trial included. 2-Year Warranty + Rescue Services5 TB£149.99£189.99RRP£40.0021%£30.00NewAmazonPrimeBuy on Amazon
Seagate Expansion Desktop, 8TB, External Hard Drive, USB 3.0, 2 year Rescue Services (STKP8000400)8 TB£260.00£298.99RRP£38.9913%£32.50NewThird partyBuy on Amazon
LaCie Mobile Drive Moon 2TB, External Hard Drive Portable, USB-C 3.2, PC Mac iPad & iPhone, Data Rescue Services (STLP2000400)2 TB£107.99£134.97Was£26.9820%£54.00NewAmazonPrimeBuy on Amazon
LaCie 4TB Rugged Portable Hard Drive | USB-C (STFR4000800) | All-terrain portable HDD, drop, crush & rain resistant, bus-powered. Adobe CC trial included. 3-Year Warranty + 3-Year Rescue4 TB£196.99£219.00Was£22.0110%£49.25NewAmazonPrimeBuy on Amazon
LaCie 2TB Rugged Portable Hard Drive | USB-C (STFR2000800) | All-terrain portable HDD, drop, crush & rain resistant, bus-powered. Adobe CC trial included. 3-Year Warranty + 3-Year Rescue2 TB£144.99£163.99RRP£19.0012%£72.50NewAmazonPrimeBuy on Amazon
WD 6TB Elements portable external hard drive, USB 3.0, portable external storage, Plug-and-Play, SuperSpeed USB 3.2 Gen 1, Formatted for PC and Mac, Black6 TB£172.99£189.99RRP£17.009%£28.83NewAmazonPrimeBuy on Amazon
Seagate Game Drive for Xbox 5TB, External Hard Drive Portable, USB 3.2 Gen 1, White with built-in green LED bar, Xbox Certified, Data Rescue Services (STKX5000100)5 TB£134.99£151.19Was£16.2011%£27.00NewAmazonPrimeBuy on Amazon
Seagate Expansion Portable, 2TB, External Hard Drive, 2.5 Inch, USB 3.0, for Mac and PC, 2 year Rescue Services (STKM2000400)2 TB£99.99£115.00Was£15.0113%£50.00NewThird partyBuy on Amazon
Seagate FireCuda Gaming Hard Drive 2TB, External Hard Drive HDD, USB 3/2, RGB LED lighting, Data Rescue Services (STKL2000400)2 TB£108.99£118.99Was£10.008%£54.50NewAmazonPrimeBuy on Amazon
LaCie Rugged Mini 2TB Portable Hard Drive | USB 3.0 (LAC9000298) | All-terrain portable HDD, drop, crush & rain resistant, bus-powered. Adobe CC trial included. 3-Year Warranty + 3-Year Rescue2 TB£130.99£138.99Was£8.006%£65.50NewAmazonPrimeBuy on Amazon
LaCie Rugged Mini 4TB Portable Hard Drive | USB 3.0 (LAC9000633) | All-terrain portable HDD, drop, crush & rain resistant, bus-powered. Adobe CC trial included. 3-Year Warranty + 3-Year Rescue4 TB£173.52£181.18Was£7.664%£43.38NewAmazonPrimeBuy on Amazon
LaCie Mobile Drive Moon 1TB, External Hard Drive Portable, PC Mac iPad & iPhone, Data Rescue Services (STLP1000400)1 TB£97.99£104.97Was£6.987%£97.99NewAmazonPrimeBuy on Amazon
LaCie 5TB Rugged Portable Hard Drive | USB-C (STFR5000800) | All-terrain portable HDD, drop, crush & rain resistant, bus-powered. Adobe CC trial included. 3-Year Warranty + 3-Year Rescue5 TB£220.99£227.47Was£6.483%£44.20NewAmazonPrimeBuy on Amazon
LaCie 4TB Mobile Drive | USB-C (STLP4000400) | Portable HDD, one-click backup. Adobe CC trial included. 3-Year Warranty + 3-Year Rescue4 TB£173.97£179.99Was£6.023%£43.49NewAmazonPrimeBuy on Amazon
Seagate Game Drive for PS4, 2TB, Portable External Hard Drive, Compatible with PS4 and PS5 (STGD2000200), Black2 TB£169.00£175.00Was£6.003%£84.50NewThird partyBuy on Amazon
TOSHIBA Canvio Basics 4TB Portable External Hard Drive USB 3.0, Black4 TB£153.11£159.00Was£5.894%£38.28NewAmazonPrimeBuy on Amazon
WD Elements 18TB Desktop USB 3.0 External Hard Drive with the SanDisk Ultra 256GB USB 3.0 Flash Drive18 TB£492.98£496.98Recommended Price£4.001%£27.39NewAmazonPrimeBuy on Amazon
Sonnics 1TB Silver External Portable Hard drive USB 3.0 super fast transfer speed for use with Windows PC, Apple Mac, Smart tv, XBOX ONE & PS41 TB£47.45£49.99Was£2.545%£47.45NewAmazonPrimeBuy on Amazon
TRyYCB Portable 1TB External Hard Drive 25 Inch Plug And Play Metal Storage Tablet Compatible Devices(Black)1 TB£11.89£13.98Was£2.0915%£11.89NewThird partyBuy on Amazon
WD 24TB 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, Black24 TB£619.99--£25.83NewAmazonPrimeBuy on Amazon
WD 16TB 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, Black16 TB£433.99--£27.12NewAmazonPrimeBuy on Amazon
WD 14 TB Elements Desktop External Hard Drive - USB 3.0, Black14 TB£381.01--£27.22NewAmazonPrimeBuy on Amazon
WD 24TB Elements External Desktop Hard Drive, USB 3.1 Gen 1, Fast transfer rates, Easy add on storage for all your pictures, videos, music and documents, Black24 TB£688.40--£28.68NewThird partyBuy on Amazon
Western Digital WD 44TB My Book DuoDesktop RAID External Hard Drive USB 3.2 Gen 144 TB£1,399.99--£31.82NewAmazonPrimeBuy on Amazon
WD 14TB 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, Black14 TB£451.08--£32.22NewThird partyBuy on Amazon
WD 22TB 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, Black22 TB£708.77--£32.22NewThird partyBuy on Amazon
Seagate Expansion 22TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP22000400)22 TB£729.89--£33.18NewThird partyBuy on Amazon
Avolusion T8 Series 8TB USB 3.0 External Gaming Hard Drive for PS5 Game Console (Black) - 2 Year Warranty8 TB£277.18--£34.65NewAmazonPrimeBuy on Amazon
Seagate Expansion Portable, 5TB, External Hard Drive, 2.5 Inch, USB 3.0, for Mac and PC, 2 year Rescue Services (STKM5000400)5 TB£179.00--£35.80NewThird partyBuy on Amazon
WD 5TB Elements portable external hard drive, USB 3.0 interface, portable external storage, Plug-and-Play, SuperSpeed USB 3.2 Gen 1, Formatted for PC and Mac, Black5 TB£182.00--£36.40NewThird partyBuy on Amazon
Seagate 4TB Portable Hard Drive | USB 3.0 (STGX4000400) | Everyday HDD storage. Plug-and-play backup. Windows & macOS. Adobe CC trial included. 2-Year Warranty + Rescue Services4 TB£155.53--£38.88NewAmazonPrimeBuy on Amazon
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)4 TB£169.99--£42.50NewThird partyBuy on Amazon
WD 26TB My Book Desktop External Hard Drive, USB 3.0, External HDD with Password Protection and Auto Backup Software - WDBBGB0260HBK-NESN26 TB£1,176.47--£45.25NewAmazonPrimeBuy on Amazon
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, Blue4 TB£181.77--£45.44NewThird partyBuy on Amazon
Toshiba 6TB External Hard Drive, Mechanical, SATA, 2.5 Inch, 128MB Cache, AL15SEB060N6 TB£275.00--£45.83NewThird partyBuy on Amazon
Toshiba Canvio Basics 4TB Portable External Hard Drive USB 3.0, Black - HDTB540XK3CA4 TB£184.97--£46.24NewThird partyBuy on Amazon
Seagate Expansion Desktop, 4TB, External Hard Drive, USB 3.0, 2 year Rescue Services (STKP4000402)4 TB£191.05--£47.76NewAmazonPrimeBuy on Amazon
WD 6TB My Book Desktop External Hard Drive, USB 3.06 TB£288.32--£48.05NewThird partyBuy on Amazon
Oyen Digital Novus 16TB External USB-C Rugged 7200RPM Desktop Hard Drive16 TB£769.82--£48.11NewAmazonPrimeBuy on Amazon
Verbatim 53195 2TB Portable USB 3.0 External Hard Drive - Black2 TB£97.89--£48.95NewThird partyBuy on Amazon
WD 24TB My Book Desktop External Hard Drive, with Password Protection and Backup Software, USB 3.2 Gen1, exFAT - WDBBGB0240HBK-NESN24 TB£1,244.62--£51.86NewAmazonPrimeBuy on Amazon
WD_BLACK P10 Game Drive 2TB external portable HDD Gaming drive, for On-The-Go Access To Your Game Library - Works with Console or PC, save up to 125 games, black2 TB£111.99--£56.00NewAmazonPrimeBuy on Amazon
WD 18TB My Book Desktop External Hard Drive, USB 3.0 - WDBBGB0180HBK-NESN18 TB£1,015.46--£56.41NewThird partyBuy on Amazon
WD 16TB My Book Desktop External Hard Drive, USB 3.0 - WDBBGB0160HBK-NESN16 TB£921.33--£57.58NewThird partyBuy on Amazon
TOSHIBA Canvio Advance 2TB Portable External Hard Drive USB 3.0, Red - HDTCA20XR3AA2 TB£121.00--£60.50NewThird partyBuy on Amazon
Toshiba 2TB Canvio Gaming - Portable External Hard Drive compatible with most PlayStation, Xbox and PC consoles, USB 3.2. Gen 1 Technology, Black (HDTX120EK3AA)2 TB£125.00--£62.50NewThird partyBuy on Amazon
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)4 TB£251.65--£62.91NewThird partyBuy on Amazon
WD My Passport 2TB Portable External Hard Drive, USB 3.2 Gen 1, Blue2 TB£132.56--£66.28NewThird partyBuy on Amazon
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, Black4 TB£270.89--£67.72NewAmazonPrimeBuy on Amazon
WD 1.5 TB Elements Portable External Hard Drive - USB 3.0, Black1.5 TB£110.32--£73.55NewThird partyBuy on Amazon
Western Digital 20TB My Book Duo Desktop RAID External Hard Drive HDD, USB 3.1, With Password Protection and Auto Backup Software - WDBFBE0200JBK-NESN20 TB£1,797.58--£89.88NewThird partyBuy on Amazon
ADATA HV620S 1TB, Slim External Hard Drive, 2.5", USB 3.2 Gen1, 11.5mm Thick, Black - AHV620S-1TU3-CBK (work with PS5/XBOX)1 TB£92.08--£92.08NewThird partyBuy on Amazon
Toshiba 1TB Canvio Gaming - Portable External Hard Drive compatible with most PlayStation, Xbox and PC consoles, USB 3.2. Gen 1 Technology, Black (HDTX110EK3AA)1 TB£100.00--£100.00NewThird partyBuy on Amazon
WD 1 TB Elements Portable Hard Drive1 TB£101.34--£101.34NewThird partyBuy on Amazon
WD 1TB 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, Black1 TB£103.00--£103.00NewThird partyBuy on Amazon
WD 2TB 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, Silver2 TB£213.57--£106.79NewThird partyBuy on Amazon
Used (2)
ProductCapacityPriceAmazon’s list priceAmazon’s stated saving£/TBConditionSold byBuy
WD 5TB 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, Silver5 TB£119.70--£23.94UsedAmazonPrimeBuy on Amazon
WD 5TB 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 Blue5 TB£138.57--£27.71UsedAmazonPrimeBuy on Amazon

Cheapest alternatives by £/TB

For each offer above, the 3 cheapest in-stock listings of the same type at the same capacity (hard drives within 2TB), with or without an Amazon offer.

New

ProductCapacityPriceAmazon’s list priceAmazon’s stated saving£/TBConditionSold byBuy
TRyYCB Portable 1TB External Hard Drive 25 Inch Plug And Play Metal Storage Tablet Compatible Devices(Black)1 TB£11.89£13.98Was£2.0915%£11.89NewThird partyBuy on Amazon
Western Digital WD Red Pro NAS Hard Disk Drive22 TB£365.00--£16.59NewThird partyBuy on Amazon
Seagate Exos 26TB Internal Hard Drive, 3.5 Inch HDD, SATA3, 256MB Cache26 TB£599.00£688.58Was£89.5813%£23.04NewThird partyBuy on Amazon
6TB/8TB built-in 3.5-inch SATA 6.0Gb/s 5400RPM hard drive, suitable for NAS storage, desktop computers, surveillance DVRs, CCTV, and high-capacity reliable storage backup (6TB).8 TB£188.88--£23.61NewThird partyBuy on Amazon
MDD (MD14TSATA25672NAS) 14TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5" Internal NAS Hard Drive - 5 Years Warranty14 TB£334.75--£23.91NewAmazonPrimeBuy on Amazon
Seagate 24TB One Touch Desktop Hard Drive | USB-C (STNB24000400) | Bus-powered HDD. Single cable. Requires 15W USB-C power. PC & Mac. Adobe CC & Mylio trial. 2-Year Warranty + 2-Year Rescue24 TB£589.99£763.99RRP£174.0023%£24.58NewAmazonPrimeBuy on Amazon
Seagate 20TB One Touch Desktop Hard Drive | USB-C (STNB20000400) | Bus-powered HDD. Single cable. Requires 15W USB-C power. PC & Mac. Adobe CC & Mylio trial. 2-Year Warranty + 2-Year Rescue20 TB£516.99--£25.85NewAmazonPrimeBuy on Amazon
WD 18TB Elements Desktop External Hard Drive - USB 3.0, Black18 TB£465.99--£25.89NewAmazonPrimeBuy on Amazon
Seagate Game Drive for Xbox 5TB, External Hard Drive Portable, USB 3.2 Gen 1, White with built-in green LED bar, Xbox Certified, Data Rescue Services (STKX5000100)5 TB£134.99£151.19Was£16.2011%£27.00NewAmazonPrimeBuy on Amazon
WD 16TB 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, Black16 TB£433.99--£27.12NewAmazonPrimeBuy on Amazon
Seagate 5TB One Touch Portable Hard Drive | USB 3.0 (STKZ5000404) | Premium HDD with password protection, customizeable backup, Windows & macOS. Adobe CC trial. 2-Year Warranty + 2-Year Rescue5 TB£138.99--£27.80NewAmazonPrimeBuy on Amazon
WD 6TB Elements portable external hard drive, USB 3.0, portable external storage, Plug-and-Play, SuperSpeed USB 3.2 Gen 1, Formatted for PC and Mac, Black6 TB£172.99£189.99RRP£17.009%£28.83NewAmazonPrimeBuy on Amazon
WD Red Plus 4TB NAS 3.5" Internal Hard Drive - 5400 RPM, SATA 6Gb/s, CMR, 128MB Cache4 TB£132.42£146.99RRP£14.5710%£33.10NewAmazonPrimeBuy on Amazon
maisi 2TB Internal Hard Drive HDD – 3.5 Inch SATA 6Gb/s 7200 RPM 256MB Cache – for PC, Surveillance Storage, CCTV DVR – Frustration Free Packaging2 TB£69.99--£34.99NewThird partyBuy on Amazon
SANSCO 2TB Internal Hard Drive HDD – 3.5 Inch SATA 6Gb/s 7200 RPM 256MB Cache – for PC, Surveillance Storage, CCTV DVR – Frustration Free Packaging2 TB£69.99--£34.99NewThird partyBuy on Amazon
WD Blue 3TB Desktop Hard Disk Drive - 5400 RPM SATA 6 Gb/s 64MB Cache 3.5 Inch3 TB£126.00--£42.00NewThird partyBuy on Amazon

Renewed

ProductCapacityPriceAmazon’s list priceAmazon’s stated saving£/TBConditionSold byBuy
Seagate Exos 28TB internal server hard drive ST28000NM000C 3.5" HDD SATA 6Gb/s 7200RPM 512MB Cache (Renewed)28 TB£640.06--£22.86RenewedAmazonPrimeBuy on Amazon
Seagate Exos 24TB Internal Server Hard Drive ST24000NM000C 3.5 Inch HDD SATA 6Gb/s 7200RPM 512MB (Factory Recertified)24 TB£613.67--£25.57RenewedThird partyBuy on Amazon
Toshiba 14TB SATA 512e 256MB Cache 7200RPM 3.5" SATA 6.0Gb/s Enterprise Hard Drive - MG07ACA14TE (Renewed)14 TB£363.29--£25.95RenewedAmazonPrimeBuy on Amazon
HGST WD Ultrastar DC HC520 Hard Drive | HUH721212ALE601 | 12TB 7200RPM SATA 6Gb/s 256MB Cache 3.5" | ISE 512e | Helium Data Center Internal Hard Drive (Renewed)12 TB£311.74--£25.98RenewedAmazonPrimeBuy on Amazon
MDD (MDD10TSATA25672NAS) 10TB 7200RPM 256MB Cache SATA 6.0Gb/s 3.5inch Internal NAS Hard Drive (Renewed)10 TB£261.53--£26.15RenewedAmazonPrimeBuy on Amazon
Hitachi HGST WD Ultrastar DC HC510 10TB 7200RPM SATA 6Gb/s 3.5-inch SED Hard Drive - HUH721010ALE601 (0F27605) (Renewed)10 TB£267.92--£26.79RenewedAmazonPrimeBuy on Amazon
HGST HGST Ultrastar He6 6TB 3.5in SATA 7200 RPM Enterprise Internal Hard Drive with 64Mb Cache - HUS726060ALA640/0F18335 64 MB Cache 3.5-Inch Internal Bare or OEM Drives 0F18335 (Renewed)6 TB£164.35--£27.39RenewedAmazonPrimeBuy on Amazon
Used (4)
ProductCapacityPriceAmazon’s list priceAmazon’s stated saving£/TBConditionSold byBuy
WD 5TB 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, Silver5 TB£119.70--£23.94UsedAmazonPrimeBuy on Amazon
WD 5TB 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 Blue5 TB£138.57--£27.71UsedAmazonPrimeBuy on Amazon
Seagate IronWolf Pro 6TB Interne hard disc 8.9cm (3.5 Zoll) SATA III ST6000NE000 Bulk6 TB£189.00--£31.50UsedThird partyBuy on Amazon
Western Digital 6000 GB Network Attached Storage6 TB£200.00--£33.33UsedThird partyBuy on Amazon

Frequently asked questions

When is Prime Big Deal Days 2026?

Prime Big Deal Days 2026 runs on Amazon.co.uk on 6 and 7 October 2026, from 00:01 on 6 October to 23:59 BST on 7 October, with new offers appearing through both days.

Do I need Prime to get these offers?

Yes for offers marked Prime exclusive in our tables: Amazon reserves those for Prime members. The other prices shown are available to every Amazon.co.uk customer.

Is Amazon's list price reliable?

UK consumer protection rules require a reference price to be genuine, and we show it exactly as Amazon states it, with Amazon's own label, without recalculating it.

All Prime Big Deal Days 2026 storage deals

Last updated at 2026-10-22 18:00:46 UTC. As an Amazon Associate I earn from qualifying purchases. Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed at the time of purchase will apply to the purchase of the product. CERTAIN CONTENT THAT APPEARS ON THIS SITE COMES FROM AMAZON SERVICES LLC.