We found 28 recently priced 18TB Hard Drives (used / renewed), showing the top 10 by price per TB.
Prices start at $479.99, with
the lowest price per TB currently at $26.67/TB.
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 18TB enough for my NAS?
Start with your current data, expected growth and array layout. Nominal 18TB 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 18TB 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 18TB 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.