Best 20TB External Hard Drive Deals Right Now
Compare 20TB 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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4 offers by price per TB
See all 4 listingsWe found 4 recently priced 20TB External Hard Drives (new). Prices start at $729.99, with the lowest price per TB currently at $36.50/TB.
| # | Product | Capacity | Condition | Price / TB | Price | Region | |
|---|---|---|---|---|---|---|---|
| 1 |
Seagate Expansion 20TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP20000400)
Check form factorHDD
Price checked Oct 27, 2026 13:32 UTC
|
20 TB | New | $36.50 /TB | $729.99 | us | Amazon ↗ |
| 2 |
WD 20TB Elements Desktop External Hard Drive - USB 3.0, Black
Check form factorHDD
Price checked Oct 27, 2026 18:08 UTC
|
20 TB | New | $43.41 /TB | $868.17 | us | Amazon ↗ |
| 3 |
Glyph Blackbox PRO Desktop Drive 20TB
External 3.5"HDD
Listed warranty: 36 months · verify seller
Price checked Oct 27, 2026 18:10 UTC
|
20 TB | New | $60.00 /TB | $1199.99 | us | Amazon ↗ |
| 4 |
Western Digital 20TB My Book Duo Desktop RAID External Hard Drive HDD, USB 3.1, With Password Protection and Auto Backup Software - WDBFBE0200JBK-NESN
Check form factorHDD
Price checked Oct 27, 2026 18:08 UTC
|
20 TB | New | $65.00 /TB | $1299.99 | us | Amazon ↗ |
What to Check Before Buying a 20TB External Hard Drive
Check whether the drive needs a wall adapter or runs from USB. Compare physical size and power requirements for where you will use it.
Allow room for version history and future growth. Keep an independent copy; one external drive holding your only copy is not a backup.
Check the supported USB speed and included cable as well as the connector. USB-C describes the connector shape, not a guaranteed transfer rate.
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 20TB external HDD suitable for backups?
Can I remove the drive from a 20TB external enclosure?
Should I choose desktop or portable external storage?
Sources and further reading
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