Hi, I just bought a toshiba canvio 3.0 2tb 2.5'' external hdd. Today I connected it to my mbp OS X 10.8.1 and succesfully managed to transfer a 700MB movie. (I think it was FAT32) Then I opened utility disk to make 2 partitions and it gave me this error: "Partition failed with the error: Unable to write to the last block of the device." Finder is no more able to find the volume nor utility disk. What can i do?