Live prices · Sorted by price per TB

Best 4TB External Hard Drive Deals Right Now

Compare 4TB External Hard Drives on Amazon US by price per TB. Choose new or used, then check the model, seller and price timestamp before buying.

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10 offers by price per TB

We found 15 recently priced 4TB External Hard Drives (used / renewed), showing the top 10 by price per TB. Prices start at $148.26, with the lowest price per TB currently at $37.06/TB.

# Product Capacity Condition Price / TB Price Region
1
Seagate Backup Plus Portable 4TB External Hard Drive HDD – Black USB 3.0 for PC Laptop and Mac, 1 Year Myliocreate, 2 Months Adobe CC Photography, 2-year Rescue Service (STHP4000400)
Check form factorHDD

4TB · Used / renewed · Amazon US

Price checked Oct 27, 2026 18:13 UTC
4 TB Used / renewed $37.06 /TB $148.26 us Amazon ↗
2
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
Check form factorHDD
Listed warranty: 24 months · verify seller

4TB · Used / renewed · Amazon US

Price checked Oct 27, 2026 12:26 UTC
4 TB Used / renewed $38.63 /TB $154.51 us Amazon ↗
3
Avolusion PRO-T8 Series 4TB USB 3.0 External Gaming Hard Drive for PS5 Game Console (Black) - 2 Year Warranty (Renewed)
External 3.5"HDD
Listed warranty: 24 months · verify seller

4TB · Used / renewed · Amazon US

Price checked Oct 27, 2026 18:07 UTC
4 TB Used / renewed $40.00 /TB $159.99 us Amazon ↗
4
WD 4TB My Passport, Portable External Hard Drive, Red, backup software with defense against ransomware, and password protection, USB 3.1/USB 3.0 compatible - WDBPKJ0040BRD-WESN
Check form factorHDD

4TB · Used / renewed · Amazon US

Price checked Oct 27, 2026 13:34 UTC
4 TB Used / renewed $40.62 /TB $162.49 us Amazon ↗
5
Seagate Expansion Desktop 4TB External Hard Drive HDD – USB 3.0 for PC Laptop (STEB4000100)
Check form factorHDD

4TB · Used / renewed · Amazon US

Price checked Oct 27, 2026 12:23 UTC
4 TB Used / renewed $43.59 /TB $174.37 us Amazon ↗
6
Western Digital 4TB My Passport Portable External Hard Drive with password protection and auto backup software, White - Western DigitalBPKJ0040BWT-WESN (Renewed)
Check form factorHDD

4TB · Used / renewed · Amazon US

Price checked Oct 27, 2026 13:34 UTC
4 TB Used / renewed $45.00 /TB $179.99 us Amazon ↗
7
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
Check form factorHDD
Listed warranty: 36 months · verify seller

4TB · Used / renewed · Amazon US

Price checked Oct 27, 2026 13:32 UTC
4 TB Used / renewed $46.31 /TB $185.24 us Amazon ↗
8
WD 4TB My Passport, Portable External Hard Drive, Blue, backup software with defense against ransomware, and password protection, USB 3.1/USB 3.0 compatible - WDBPKJ0040BBL-WESN
Check form factorHDD

4TB · Used / renewed · Amazon US

Price checked Oct 27, 2026 13:34 UTC
4 TB Used / renewed $48.75 /TB $195.00 us Amazon ↗
9
Western Digital 4TB My Book Desktop External Hard Drive, USB 3.0, External HDD with Password Protection and Backup Software - WDBBGB0040HBK-NESN
Check form factorHDD

4TB · Used / renewed · Amazon US

Price checked Oct 27, 2026 13:34 UTC
4 TB Used / renewed $51.94 /TB $207.75 us Amazon ↗
10
Toshiba Canvio Basics 4TB Portable External Hard Drive USB 3.0, Black - HDTB540XK3CA
Check form factorHDD

4TB · Used / renewed · Amazon US

Price checked Oct 27, 2026 13:34 UTC
4 TB Used / renewed $52.02 /TB $208.10 us Amazon ↗
See all 15 listings

What to Check Before Buying a 4TB External Hard Drive

Power and portability

Check whether the drive needs a wall adapter or runs from USB. Compare physical size and power requirements for where you will use it.

Backup capacity

Allow room for version history and future growth. Keep an independent copy; one external drive holding your only copy is not a backup.

USB connection

Check the supported USB speed and included cable as well as the connector. USB-C describes the connector shape, not a guaranteed transfer rate.

Enclosure and warranty

Do not assume a particular internal drive model or recording technology unless the manufacturer documents it. Check warranty terms before removing an enclosure.

Frequently Asked Questions

Is a 4TB external HDD suitable for backups?
It can be, if its capacity fits your data, retained versions and expected growth. Plan an independent offsite copy as well, and test restoring files rather than only checking that backup software runs.
Can I remove the drive from a 4TB external enclosure?
Internal hardware can change between production runs, and some products use connections unsuitable for a standard drive bay. Verify the exact hardware and warranty implications; buying an external drive does not guarantee a specific NAS-compatible internal model.
Should I choose desktop or portable external storage?
Choose based on power access, carrying requirements and capacity. Compare actual offers rather than assuming one form factor is always cheaper per TB.

Sources and further reading

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