My Passport 1Tb on a iMac late 2010 27" Problems

[willynanita]

I will do the complete test on the vibrating drive.

Thing is that later the day I was testing both drives, the good one all of the sudden showed no files while the vibrating one was showing everything fine.

I really don’t know if I can trust these drives to work on the mac. I need to have them on all the time because I don’t use them as a back up but as a normal day to day drives.