Drive X only bringing up Mac HD, none of externals, none. One external is indeed plugged right into back of Mac Mini -- still not showing in Drive X. Two others are now in hub as only two type A port. But even hub should show in drives X?
Reinstall DriveDX. DriveDX uses to access S.M.A.R.T. date on USB drives that needs to be reinstalled.
Uses what, and what needs to be reinstalled?
I had to install SATSMARTDriver (a separate instalation..."other version") before DriveDx could see my external.