I'm going to read from

Page 32 shows what encoding is supported with a lot of restrictions. Folk new to playing files on HDTVs often get the feeling they were tossed under a busload of information but my short reply is that you can't count on any file to play that is not encoded exactly to what's on that page.

Page 30 notes even more restrictions about which USB port can be used along with NTFS support so in my opinion I would have never partitioned the drive.