Best 4TB External Hard Drive Deals Right Now
Every 4TB external hard drive we track, in one live table sorted by price per TB. Prices refresh from Amazon regions throughout the day, so the top row is the current best deal at this capacity. Below the table: what to check before you buy, and answers to the most common 4TB questions.
Updated July 29, 2026
Top 10 by Price per TB
See all 15 listings| # | Product | Capacity | Condition | Price / TB | Price | Region | |
|---|---|---|---|---|---|---|---|
| 1 | Avolusion T8 Series 4TB USB 3.0 External Gaming Hard Drive for PS5 Game Console (Black) - 2 Year Warranty | 3.9 TB | Used | $35.84 /TB | $140.00 | us | View |
| 2 | Avolusion PRO-T8 Series 4TB USB 3.0 External Gaming Hard Drive for PS5 Game Console (Black) - 2 Year Warranty (Renewed) | 3.9 TB | Used | $35.84 /TB | $140.00 | us | View |
| 3 | WD 4TB My Passport for Mac, Navy, Portable External Hard Drive with backup software and password protection, USB 3.1/USB 3.0 compatible - WDBA2F0040BBL-WESN | 3.9 TB | Used | $42.24 /TB | $165.00 | us | View |
| 4 | WD 4TB Elements Portable External Hard Drive for Windows, USB 3.2 Gen 1/USB 3.0 for PC & Mac, Plug and Play Ready - WDBU6Y0040BBK-WESN | 3.9 TB | Used | $46.08 /TB | $180.00 | us | View |
| 5 | Seagate Expansion Desktop, 4TB, External Hard Drive, USB 3.0 (STKP4000400) | 3.9 TB | New | $46.59 /TB | $182.00 | us | View |
| 6 | LaCie Rugged USB-C, 4TB, Portable External Hard Drive, Drop, Shock, Dust, Rain Resistant, for Mac & PC (STFR4000800) | 3.9 TB | Used | $46.85 /TB | $183.00 | us | View |
| 7 | Toshiba Canvio Advance 4TB Portable External Hard Drive USB 3.0, Black - HDTCA40XK3CA | 3.9 TB | Used | $49.15 /TB | $192.00 | us | View |
| 8 | WD 4TB Elements Portable External Hard Drive for Windows, USB 3.2 Gen 1/USB 3.0 for PC & Mac, Plug and Play Ready - WDBU6Y0040BBK-WESN | 3.9 TB | New | $49.15 /TB | $192.00 | us | View |
| 9 | WD 4TB My Passport, Portable External Hard Drive, Black, backup software with defense against ransomware, and password protection, USB 3.1/USB 3.0 compatible - WDBPKJ0040BBK-WESN | 3.9 TB | New | $49.92 /TB | $195.00 | us | View |
| 10 | Toshiba Canvio Advance 4TB Portable External Hard Drive USB 3.0, Black - HDTCA40XK3CA | 3.9 TB | New | $50.94 /TB | $199.00 | us | View |
What to Check Before Buying a 4TB External Hard Drive
3.5-inch desktop externals need wall power but cost much less per TB. 2.5-inch portables run off USB but top out around 5TB.
Externals often contain SMR or white-label drives. If you plan to shuck the drive for a NAS, research which model is inside the enclosure first.
USB 3.0 (5 Gbps) saturates any hard drive, so USB-C vs USB-A is about convenience, not speed. Thunderbolt adds nothing for a single HDD.
Ignore it in the price comparison - free tools (or your OS) do the same job.
Frequently Asked Questions
Is a 4TB external drive good for backups?
Can I shuck a 4TB external drive and use it in a NAS?
Desktop or portable 4TB external drive - which should I buy?
Want to filter by region, warranty, or condition?
The full price table compares every drive we track across Amazon US, UK, DE, FR, CA, IT, and ES.
More Best-Deal Pages