MAke sure the hd is partitioned correctly and that the hd you purchased is compatible.
So recently i upgraded from a 16 GB Memory stick to a 1TB WD 10EACS HDD to store more games.
I had no problems whatsoever with the usb stick, but when i try to load games with the HDD i get a black screen in USB Loader GX. I copied the games over from my usb stick and other external HDD
Well, i checked the compatibility list and all the WD drives seem to work.
I haven't partitioned it though, do you have to partition it?
I formatted it to wbfs using the wbfs manager
I have a question. I didn't recognize the drive as one that gets regularly talked about so I did a quick check. A WD 10EACS is an internal drive. Are you sure you have the right model number? If you have the model right what kind of enclosure do you have it in?