Hey, i'm new to the forum and the mede8er thing

I'm looking for some help regarding the HDD for the mede8er MED450X2 "Firmware v3.0.5", i bought one not to long ago and always just used a USB Driver to watch movies ect...
I have a spare 1TB hdd laying around and external casing for it, But my mede8er doesn't pick it up via usb, Must i format the drive with a special program or is there some setting i need to change ?
Thanks in advance
