I have an older 360 with a 10GB hard drive I just bought a 120GB hard drive and tried to transfer the data. All drives and transfer cable are Microsoft, I plugged new hard drive into 360 then plugged transfer cable in xbox then plugged in the old drive to the cable.
I got the message asking if I want to transfer data I selected start and it started to transfer, but it only moved a few files. It gave a message "some data was unable to transfer" or something like that. It only moved less than 1GB of data. What am I doing wrong? Id hate to lose all my saved games.