I have a 3 month old WD My Passport Ultra 2 TB external hard drive. The problems are when I plug my external hdd to my pc and other laptops I get half speeds and ISO and other compressed files aee mostly corrupted but whn plugged it into my Lenovo G500 laptop then I get double speed on USB 3.0 and also 2.0 and also no corruption occurs. The corruption occurs in other devices only sometimes. I tried formatting and SMART. What would be the cause ? All my devices are running Windows 8 and corruption does not occur to movies and other stuff. Should I RMA it ? Kindly help me.