I can connect the positive reviews me only. I have 9 of the Intenso hard drive (1TB) to back up my data. Until now, I still do not let down (since 2010). Nevertheless, I precaution reflects a lot of data, because I have done this nasty experience with other products. That the recognition and the data transfer takes a little I take gladly accept if the data is safe. I close the plates several times a day and everything works reliably - as it should be! The MAC recognizes the drive without any problems - no formatting o.ä.nötig.