Oppo DV-980H USB input questions

Reading the manual, it appears that you can use the front USB connection as a source for the unit. It says it will accept DivX/Xvid, digital audio and digital picture files.

Has anyone ever used this fuction for SACD or high bitrate audio files? If so, what's the best format/extension for the digital files to read it? I'd love it if I could store some high bit rate files on the USB, and then have the Oppo decode. Just curious what type of file it will be looking for.