Oppo BD-95 file capability

I am considering upgrading to the Oppo BD -95. I read that it will play files directly via its USB or eSata inputs. This brings up two questions. First, how large of a drive is it limited to, i.e. will it only play files on a small memory stick or can I attach, say, a 500 GB portable hard drive. Next, is there any limitation to the type of file it will play this way, i.e. can it play 24/96 and 24/192 files.

Thanks