The 5 Best External Hard Drives for Backup
Five external hard drives for backup, including 500 GB External Hard Drives and UnionSine 500GB Ultra Slim, compared by capacity, connection, portability and backup routine.
Our top 5 external hard drives for backup
Swipe to compare price, rating and best use →
| Product | Price | Rating | Best for |
|---|---|---|---|
01 Kosbees 500 GB External Hard Drives Portable Hard Drive for WindowsDetails ↓ | $36.99 | 4.3/5Amazon | Best small 500GB drive |
02 UnionSine 500GB Ultra Slim Portable External Hard DriveDetails ↓ | $39.43 | 4.4/5Amazon | Best slim portable drive |
03 Seagate Portable 4TB External Hard Drive HDD USB 3.0 for PCDetails ↓ | $189.99 | 4.6/5Amazon | Best 4TB capacity |
04 YOTUO 1TB External Hard Drive Portable Storage Expansion HDDDetails ↓ | $85.99 | 4.3/5Amazon | Best 1tb alternative |
05 Western Digital WD 5TB Elements Portable External Hard Drive for WindowsDetails ↓ | $228.99 | 4.6/5Amazon | Best 8TB desktop archive |
01 — Kosbees
Best small 500GB drive500 GB External Hard Drives Portable Hard Drive for Windows
Kosbees 500 GB External Hard Drives provides 500 GB mechanical-disk storage. Check the exact connector and cable against the computer or console, and format the drive only after copying off any existing files. A desktop enclosure may need separate power. An external USB HDD can store Series X|S-optimized titles, but those games generally need internal storage or an approved expansion card to play. Choose capacity for at least one full backup plus growth, and keep a second independent copy of important files.
View on Amazon ↗Shoppers comparing external hard drive
The linked size, configuration, fit or compatibility requirements do not match your use case.
Reasons to buy
+500 GB
Reasons to avoid
−Mechanical drive is slower than an SSD
02 — UnionSine
Best slim portable driveUnionSine 500GB Ultra Slim Portable External Hard Drive
UnionSine's slim 500GB HDD is a light, low-capacity option for moving ordinary files between compatible computers. I would verify the connector and available space after formatting rather than rely on the advertised number alone. It is not the right choice for a large video archive, and a dropped mechanical drive can still fail despite a slim case. Choose capacity for at least one full backup plus growth, and keep a second independent copy of important files.
View on Amazon ↗Shoppers comparing external hard drive
The linked size, configuration, fit or compatibility requirements do not match your use case.
Reasons to buy
+500 GB
+USB
Reasons to avoid
−Mechanical drive is slower than an SSD
03 — Seagate
Best 4TB capacitySeagate Portable 4TB External Hard Drive HDD USB 3.0 for PC
Seagate Portable 4TB External Hard Drive HDD USB 3.0 for PC lists usb 3.0, 1-Year Rescue and everyday HDD storage. Plug-and-play backup. Windows & macOS. Adobe CC trial included. 1-Year Warranty. Choose capacity for at least one full backup plus growth, and keep a second independent copy of important files.
View on Amazon ↗Shoppers comparing external hard drive
The linked size, configuration, fit or compatibility requirements do not match your use case.
Reasons to buy
+4 TB
+USB
Reasons to avoid
−Mechanical drive is slower than an SSD
04 — YOTUO
Best 1tb alternativeYOTUO 1TB External Hard Drive Portable Storage Expansion HDD
YOTUO's 1TB portable HDD is for a modest archive when buying a 5TB drive would be wasted. I would check the exact USB connection and formatting needs on the laptop before plugging it in. The smaller capacity can be enough for documents and occasional media, but it gives less room for a growing photo library. Choose capacity for at least one full backup plus growth, and keep a second independent copy of important files.
View on Amazon ↗Shoppers comparing external hard drive
The linked size, configuration, fit or compatibility requirements do not match your use case.
Reasons to buy
+1 TB
+USB
+USB-C
Reasons to avoid
−Mechanical drive is slower than an SSD
05 — Western Digital
Best 8TB desktop archiveWestern Digital WD 5TB Elements Portable External Hard Drive for Windows
Western Digital WD 5TB Elements Portable External Hard Drive for Windows is an external hard drive with 5TB HDD capacity, USB 3.2 Gen 1 connection. External HDDs favor lower cost per terabyte but differ in cable type, power needs and included backup software. Check the advertised capacity, connector, warranty and whether the drive needs external power. Choose capacity for at least one full backup plus growth, and keep a second independent copy of important files.
View on Amazon ↗Reasons to buy
+5 TB
+USB
Reasons to avoid
−Mechanical drive is slower than an SSD
Price information
Amazon price and availability checked Oct 17, 2026, 10:25 PM Lisbon time. Prices and availability are subject to change; the information shown on Amazon.com at purchase applies.
Our process
How we picked.
We compare five relevant products for different needs, using documented specifications, clear use cases and practical trade-offs. Our goal is to make the differences clear and help you choose with confidence.
- 01Relevance
Each product must fit the guide’s intended use, audience and requirements.
- 02Specifications
We compare the key product details that meaningfully affect the buying decision.
- 03Use case and fit
We compare the intended use, configuration and practical fit of every selected product.
- 04Strengths and limitations
We explain where each option performs best and the compromises to consider.
Good questions
FAQ — External Hard Drives for Backup
01How does Kosbees 500 GB External Hard Drives Portable Hard Drive for Windows address capacity?+
Kosbees 500 GB External Hard Drives Portable Hard Drive for Windows leads this shortlist for small 500gb drive. Kosbees 500 GB External Hard Drives provides 500 GB mechanical-disk storage. Choose capacity for at least one full backup plus growth, and keep a second independent copy of important files.
02Should I consider UnionSine 500GB Ultra Slim Portable External Hard Drive when connection matters?+
UnionSine 500GB Ultra Slim Portable External Hard Drive addresses slim portable drive; Kosbees 500 GB External Hard Drives Portable Hard Drive for Windows is here for small 500gb drive. UnionSine's slim 500GB HDD is a light, low-capacity option for moving ordinary files between compatible computers.
03How do Seagate Portable 4TB External Hard Drive HDD USB 3.0 for PC and YOTUO 1TB External Hard Drive Portable Storage Expansion HDD compare on portability?+
Seagate Portable 4TB External Hard Drive HDD USB 3.0 for PC lists usb 3.0, 1-Year Rescue and everyday HDD storage. YOTUO's 1TB portable HDD is for a modest archive when buying a 5TB drive would be wasted. Verify their stated portability for the exact configurations.
04What should I check about Western Digital WD 5TB Elements Portable External Hard Drive for Windows and backup routine?+
Western Digital WD 5TB Elements Portable External Hard Drive for Windows is an external hard drive with 5TB HDD capacity, USB 3.2 Gen 1 connection. Choose capacity for at least one full backup plus growth, and keep a second independent copy of important files.
05How much external drive capacity should a backup have?+
Choose capacity for at least one full backup plus growth, and keep a second independent copy of important files. For example, Kosbees 500 GB External Hard Drives provides 500 GB mechanical-disk storage. Western Digital WD 5TB Elements Portable External Hard Drive for Windows is an external hard drive with 5TB HDD capacity, USB 3.2 Gen 1 connection.
The short answer
Start with the 500 GB External Hard Drives Portable Hard Drive for Windows.
It is our first pick for this guide’s exact scope. Choose another option when its stated use case or trade-off better matches yours.
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