Bests & Worsts Reviews from Amazon

I copied 380Gb of data onto this drive and then unmounted correctly. Two days later I inserted it into the same computer and got the following message "The disk you inserted was not readable by this computer." Luckily I adhere to double copies of data, a less careful person might have seriously lost something valuable. I tried reinitializing the drive and unfortunately I just get errors. It was quite a bit slower than I expected, but it is physically very small.