I have just installed a Pioneer AVH-x5500bt and tbh the HU is awesome.
The only problem I have is connecting my 500gb mobile HDD.

I have formated the drive to FAT32 but the HU is saying "Incompatible USB"

The drive has around 100 albums on it in mp3 format.

I have had a good look around several forums. Some say that 500gb is too big for the HU to handle. Some say that the drive would need more power than the 1amp that the HU is providing on USB and some are saying they have 1tb drives running with no problems at all.

All this confliciting advice is not helping?!

Has anyone else had this problem?