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#11
I've also recovered 3.5" HDDs from 'portable' cases that worked well, seems it's the interface in the case between the drive and the cable from the computer that gives the most trouble. Being self-powered they need both 12V and 5V power provided by that interface. For truly portable use I use either cases that accept the 2.5" Notebook drives or a couple of pocketable WDC My Passport, one is 1TB and the other is 500GB reformatted from Mac OS X to NTFS.