If you want to check health status, temperature and many other vital parameters of hard drives connected through USB port then you can try Active SMART for USB drives. This version
- USB hard drives (see Important note below)
- internal ATA/SATA hard drives
and supports S.M.A.R.T technology.
You can read more about ActiveSMART and its features on its homepage
Download free trial version: Active SMART 2.6 for USB drives
Buy Active SMART for USB drives with 40% discount