Live prices · Sorted by price per TB

Best 20TB Hard Drive Deals Right Now

Compare 20TB 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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5 offers by price per TB

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We found 5 recently priced 20TB Hard Drives (used / renewed). Prices start at $649.99, with the lowest price per TB currently at $32.50/TB.

#	Product	Capacity	Condition	Price / TB	Price	Region
1	Seagate Exos ST20000NM004C 20TB 7200RPM 512e SATA 6Gb/s 512MB Cache CMR 3.5-Inch Enterprise Hard Drive (Renewed) 3.5"HDD 20TB · Used / renewed · Amazon US Price checked Oct 27, 2026 13:32 UTC	20 TB	Used / renewed	$32.50 /TB	$649.99	us	Amazon ↗
2	Western Digital Ultrastar DC HC560 WUH722020BLE601 0F38781 20TB 7200 RPM SATA 6Gb/s 512e 512MB Cache Power Disable 3.5in Enterprise Hard Drive (Renewed) Check form factorHDD 20TB · Used / renewed · Amazon US Price checked Oct 27, 2026 12:22 UTC	20 TB	Used / renewed	$33.95 /TB	$679.00	us	Amazon ↗
3	Seagate Exos X24 20TB Enterprise Hard Drive HDD SATA 6Gb/s 512MB Cache 7200 RPM 512e CMR Helium Sealed 3.5in Hard Drive ST20000NM000H (Renewed) Check form factorHDD 20TB · Used / renewed · Amazon US Price checked Oct 27, 2026 05:17 UTC	20 TB	Used / renewed	$34.50 /TB	$689.99	us	Amazon ↗
4	Seagate (Renewed) Exos X22 20TB SATA 6Gb/s 7200RPM 3.5-inch Enterprise HDD (ST20000NM004E) 3.5-inchHDD Listed warranty: 3 months · verify seller ST20000NM004E specifications → 20TB · Used / renewed · Amazon US Price checked Oct 27, 2026 13:34 UTC	20 TB	Used / renewed	$37.48 /TB	$749.50	us	Amazon ↗
5	Western Digital 20TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 512 MB Cache, 3.5" - WD201KFGX 3.5-inchHDD WD201KFGX specifications → 20TB · Used / renewed · Amazon US Price checked Oct 27, 2026 13:32 UTC	20 TB	Used / renewed	$40.00 /TB	$799.99	us	Amazon ↗

See all 5 listings

What to Check Before Buying a 20TB Hard Drive

Recording technology

Check CMR or SMR for the exact model. For a NAS or sustained writes, start with your enclosure's compatibility list and workload requirements.

Warranty provider

A manufacturer's specification describes an eligible new drive. OEM, bulk and renewed offers may have different seller or manufacturer coverage.

Workload and compatibility

Confirm SATA versus SAS, drive dimensions, supported bays and the model-specific workload rating before buying.

Usable capacity

Account for formatting, redundancy and free space. A mirror uses two drives to provide approximately one drive's capacity; it does not replace an independent backup.

Frequently Asked Questions

Is 20TB enough for my NAS?

Start with your current data, expected growth and array layout. Nominal 20TB capacity is measured in decimal units; filesystem overhead and redundancy reduce usable space. Keep a separate backup of important data.

Should I buy a new or used 20TB hard drive?

Compare the actual price saving with the seller's return period, warranty and available test history. A used drive's age or enterprise branding does not prove its health. New and used drives both need independent backups.

What is a good price per TB for a 20TB hard drive?

Use the lowest recently checked offer in the table as a starting point among the listings we track. Compare the same condition and interface, then confirm the seller and final price on Amazon. We do not cover every market offer.

Sources and further reading

Toshiba N300 Pro model specifications

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