Sorry Marcellis22 ,,This external hard drive is only connected to the computer by USB cable .No powerfeed involved
Plugged it this morning in a different spot on the tower itself instead of to my 7 spot hub . It showed for half a minute and then I got the message : "Windows delayed write failed"
If you're using a drive that's powered by the USB cable you should plug it directly into one of the USB ports on the computer case itself. A hub has to distribute power from it's one connection to the computer down to multiple devices and it probably doesn't have enough to run the drive.