Nexto-eXtreme is compatible with all the 2.5 inch SATA hard drive with 9.5mm height.
But hard drive from following company is not robust for the continuous shock(such as backup during walking or running).
If you walk or run during backup with following hard drive installed in Nexto-eXtreme, then you'll see error message and beep sound which indicate backup failed.

Hard drive which makes error when continuous shock applied during backup.
- Every 2.5 inch hard drive from WesternDigital.
- Every 2.5 inch hard drive from Seagate.