I 've bought a 1TB and a 1,5 TB
they differ in case size, too bad, I can 't stack them now
Otherwise fine units, but makes a noice I cant' live with all day
so I mount them when I need them and copy from my internal HD
I would like them to be more silent
But they are rotating disks at high speed, It' physics
no problems for the moment, extremely fast
also suited for video streams in HD !!!
buy it !