Best Hard Drives for Backup
Backup storage is all about cost per terabyte, adequate capacity, and reliability. Whether you are backing up a home PC to a single external drive, building a NAS backup target, or setting up a cold-storage archive shelf, the ideal backup drive delivers the most usable terabytes for the least money without sacrificing data safety. Backup workloads are mostly sequential writes followed by long idle periods, so you do not need cutting-edge speed — you need capacity and trustworthiness.
Choosing a backup drive
For single-drive external backups, any reliable high-capacity HDD works — focus on price per TB. For NAS backup targets (Synology, QNAP, TrueNAS), NAS-rated drives add vibration tolerance and always-on firmware. For cold-storage archives that sit powered off most of the time, enterprise or refurbished datacenter drives offer the highest density at the lowest cost. In all cases, a backup drive does not need to be fast — it needs to be big and reliable.
Quick Verdict
- Who this is for
- Anyone building a backup target — home PC users, NAS owners backing up to a second volume, and cold-storage archivists who need maximum capacity at minimum cost.
- What usually wins
- The cheapest new drive at 8 TB or above for simple backups. A NAS-rated drive if your backup target runs 24/7 in a multi-bay enclosure. Refurbished enterprise pulls for cold-storage shelves where cost matters most.
- Prioritise
- Capacity and price per TB above all else. Backup workloads are write-once, read-rarely — raw speed and premium features matter less than having enough room and keeping costs low.
Prices updated hourly from Amazon US and UK. All links go directly to the retailer.
Best Overall Backup Value
The cheapest new high-capacity drives available, ranked by price per terabyte. Great for any backup use case where you want the most storage for the least money.
Seagate IronWolf ST4000VN008 4TB Internal Hard Drive, NAS HDD, 3.5 Inch, 5900 rpm, CMR, 64 MB Cache, SATA 6 GB/s, Silver, 3 Years Data Rescue Service
ModusTech External (DESKTOP) Hard Drive USB 3.1 Type-C - High-Speed Data Storage for PC, Mac, Laptops, and Gaming Consoles - Durable Design, Compatible with Windows, MacOS, Linux (16.0, TB)
ModusTech External (DESKTOP) Hard Drive USB 3.1 Type-C - High-Speed Data Storage for PC, Mac, Laptops, and Gaming Consoles - Durable Design, Compatible with Windows, MacOS, Linux (14.0, TB)
MDD 10TB 7200RPM 256MB Cache SAS 12.0Gb/s 3.5inch Internal Enterprise Hard Drive (MDD10TSAS25672E) - [NOT A SATA HDD]
ModusTech External (DESKTOP) Hard Drive 3TB USB 3.0 & Type-C 3.0 - High-Speed Data Storage for PC, Mac, Laptops, and Gaming Consoles - Durable Design, Compatible with Windows, MacOS, Linux (16.0, TB)
UnionSine External Hard Drive 14TB 3.5" Desktop HDD USB3.0 Storage Compatible for PC, Mac, TV, Desktop, Laptop(Black) HD3513
Seagate Exos 7E10 8TB Internal Hard Drive HDD - 3.5 Inch 512e/4Kn SAS 6GB/s, 7.200 RPM, 256MB Cache and 2M MTBF for Enterprise, Data Centre (ST8000NM017B)
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
High-Capacity Archive Drives (12 TB+)
Large drives for archiving media libraries, server images, and long-term data. More capacity per drive means fewer drives to manage and less shelf space needed.
Seagate IronWolf ST4000VN008 4TB Internal Hard Drive, NAS HDD, 3.5 Inch, 5900 rpm, CMR, 64 MB Cache, SATA 6 GB/s, Silver, 3 Years Data Rescue Service
ModusTech External (DESKTOP) Hard Drive USB 3.1 Type-C - High-Speed Data Storage for PC, Mac, Laptops, and Gaming Consoles - Durable Design, Compatible with Windows, MacOS, Linux (16.0, TB)
ModusTech External (DESKTOP) Hard Drive USB 3.1 Type-C - High-Speed Data Storage for PC, Mac, Laptops, and Gaming Consoles - Durable Design, Compatible with Windows, MacOS, Linux (14.0, TB)
ModusTech External (DESKTOP) Hard Drive 3TB USB 3.0 & Type-C 3.0 - High-Speed Data Storage for PC, Mac, Laptops, and Gaming Consoles - Durable Design, Compatible with Windows, MacOS, Linux (16.0, TB)
UnionSine External Hard Drive 14TB 3.5" Desktop HDD USB3.0 Storage Compatible for PC, Mac, TV, Desktop, Laptop(Black) HD3513
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
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, Black
Seagate Expansion 22TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP22000400)
NAS Backup Drives
IronWolf and WD Red drives for NAS-based backup targets. NAS firmware handles always-on operation, RAID arrays, and multi-drive enclosures — ideal if your backup destination is a Synology, QNAP, or Unraid box.
Why this matters: If your backup target is a NAS running 24/7, NAS-rated drives are worth the modest premium. They include vibration tolerance for multi-bay enclosures, error recovery tuning for RAID, and firmware optimised for continuous operation. For a powered-off external drive, standard drives work fine.
Seagate IronWolf ST4000VN008 4TB Internal Hard Drive, NAS HDD, 3.5 Inch, 5900 rpm, CMR, 64 MB Cache, SATA 6 GB/s, Silver, 3 Years Data Rescue Service
Seagate IronWolf Pro 28TB Enterprise NAS Internal HDD Hard Drive – CMR 3.5 Inch SATA 6Gb/s 7200 RPM 512MB Cache for RAID Network Attached Storage, Rescue Services (ST28000NT000)
Seagate IronWolf 14TB NAS Internal Hard Drive HDD – 3.5 Inch SATA 6Gb/s 7200 RPM 256MB Cache for RAID Network Attached Storage (ST14000VN0008)
Seagate IronWolf Pro, 20 TB, Enterprise NAS Internal HDD –CMR 3.5 Inch, SATA 6 Gb/s, 7,200 RPM, 256 MB Cache for RAID Network Attached Storage (ST20000NT001)
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)
Seagate IronWolf Pro 28TB, NAS internal hard drive, 3.5", 7200 U/Min, CMR, 512 MB Cache, SATA 6 GB/S, Data Rescue Service (ST28000NTZ00)
WESTERN DI - WD Red PRO Nas Hard Drive WD181KFGX - HD - 6176921
Seagate IronWolf Pro 16TB 7200 RPM SATA 6Gb/s 3.5" NAS HDD (ST16000NE000)
Refurbished Drives for Budget Backups
Used enterprise drives at 40-60% less than new retail. Excellent for bulk backup and cold-storage archives where brand-new warranty is not essential. These datacenter pulls are designed for millions of hours of operation.
ModusTech External (DESKTOP) Hard Drive 3TB USB 3.0 & Type-C 3.0 - High-Speed Data Storage for PC, Mac, Laptops, and Gaming Consoles - Durable Design, Compatible with Windows, MacOS, Linux (16.0, TB)
WD 16TB 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
Seagate Expansion Desktop 20TB, External Hard Drive, USB 3.0, Data Rescue Services (STKP20000400)
Seagate Expansion Desktop 24TB, External Hard Drive, USB 3.0, Data Rescue Services (STKP24000400)
Seagate Exos 7E10 8TB Internal Hard Drive HDD - 3.5 Inch 512e/4Kn SAS 6GB/s, 7.200 RPM, 256MB Cache and 2M MTBF for Enterprise, Data Centre (ST8000NM017B)
ModusTech External (DESKTOP) Hard Drive USB 3.1 Type-C - High-Speed Data Storage for PC, Mac, Laptops, and Gaming Consoles - Durable Design, Compatible with Windows, MacOS, Linux (12, TB)
Hgst 198944 Hard Drive 0f30146 3.5 Inch 12tb Es 72000rpm 256mb Sata 6gb/s 512e Se Ultrastar He12bare
HEWLETT PACKARD HUH728080AL5204-HPE 8TB 7.2K 12G LFF SAS Hard Drive
How to Choose
Backup drives sit at the intersection of capacity, cost, and just-enough reliability. Here is how to pick the right one.
Capacity first
Your backup drive should be at least as large as the data set you are protecting — ideally larger to allow growth. At 8 TB and above, per-TB pricing improves significantly. Buy the largest drive your budget allows.
Price per TB
Backup storage is cost-sensitive. Compare drives on a per-TB basis rather than sticker price. A higher total price on a larger drive often delivers a lower cost per terabyte.
New vs refurbished
New drives include manufacturer warranties and known-good health. Refurbished enterprise pulls cost 40–60% less and work well for backup — especially cold-storage archives where the drive is powered off between backup runs. Both are valid depending on your budget and risk tolerance.
NAS vs single-drive use
If your backup target is a NAS running 24/7, use NAS-rated drives (IronWolf, WD Red Plus) for vibration tolerance and always-on firmware. For a single external drive or a powered-off shelf drive, any standard HDD is fine.
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