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Desktop drives cost less but need power.

This guide is built from Amazon product listings and maker specs, not our own testing, so confirm compatibility, capacity and current price on each product page.

Prices are approximate and were shown on Amazon.com on November 1, 2026; check the current price.

Last updated: November 1, 2026.

Quick Picks

Product Type Best for
WD My Passport 4TB Portable External Hard Drive Portable HDD with backup software 4TB storage
UnionSine 4TB Ultra Slim Portable External Hard Drive Portable HDD, USB 3.0 4TB storage
Seagate Portable 4TB External Hard Drive Portable HDD, USB 3.0 4TB storage
Toshiba Canvio Basics 4TB Portable Hard Drive Portable HDD, USB 3.0 4TB storage
Seagate Expansion Desktop 4TB Desktop HDD, USB 3.0 4TB storage
LaCie Rugged USB-C 4TB Rugged portable HDD 4TB storage

Our Picks

1. WD My Passport 4TB Portable External Hard Drive

A WD My Passport 4TB Portable External Hard Drive (portable hdd with backup software), per the listing. It showed at about $193 on Amazon.com on November 1, 2026.

Good for: 4TB storage. Watch out: Software is optional.

Check on Amazon

2. UnionSine 4TB Ultra Slim Portable External Hard Drive

An UnionSine 4TB Ultra Slim Portable External Hard Drive (portable hdd, usb 3.0), per the listing. It showed at about $195 on Amazon.com on November 1, 2026.

Good for: 4TB storage. Watch out: Lesser-known brand.

Check on Amazon

3. Seagate Portable 4TB External Hard Drive

A Seagate Portable 4TB External Hard Drive (portable hdd, usb 3.0), per the listing. It showed at about $190 on Amazon.com on November 1, 2026.

Good for: 4TB storage. Watch out: Slow compared with an SSD.

Check on Amazon

4. Toshiba Canvio Basics 4TB Portable Hard Drive

A Toshiba Canvio Basics 4TB Portable Hard Drive (portable hdd, usb 3.0), per the listing. It showed at about $214 on Amazon.com on November 1, 2026.

Good for: 4TB storage. Watch out: Basic features.

Check on Amazon

5. Seagate Expansion Desktop 4TB

A Seagate Expansion Desktop 4TB (desktop hdd, usb 3.0), per the listing. It showed at about $195 on Amazon.com on November 1, 2026.

Good for: 4TB storage. Watch out: Needs wall power.

Check on Amazon

6. LaCie Rugged USB-C 4TB

A LaCie Rugged USB-C 4TB (rugged portable hdd), per the listing. It showed at about $210 on Amazon.com on November 1, 2026.

Good for: 4TB storage. Watch out: Check cable and port.

Check on Amazon

How to Choose

HDD vs SSD

Hard drives cost less per terabyte; SSDs are faster and tougher.

Capacity

Pick 2TB to 5TB for backups and media.

Format

Windows drives may need reformatting for Mac. Back up before reformatting.

Frequently Asked Questions

How long do hard drives last?

Often several years; replace and back up regularly.

Do I need external power?

Portable drives use USB power; desktop drives need an adapter.

Is one backup enough?

No. Keep another copy.

Bottom Line

For most people, a 4TB WD My Passport or Seagate Portable.

More Storage Guides