Games:
Not counting homebrew games, the PSP currently only plays games on UMDs (Universal Media Discs). Sony plans a PlayStation emulator for the PSP, which might be able to play game ROMs off a Memory Stick.
Video:
Aside from movie and music videos available commercially on UMD, the PSP can also play video files from the Memory Stick. These files must be in MPEG-4 format.
Music: - UMD
- MP3
- ATRAC3plus
- MP4
- WAV
- WMA
Music can come on UMD (though usually it comes in the form of music videos). You can also load up your own music to play, as long as it's in one of the formats listed (you may not be able to play some of the file formats if you're using a Memory Stick Pro Duo, though; only the Memory Stick Duo is compatible with all file formats).
Photo & Image: - UMD
- jpeg (aka jpg)
- tiff
- gif
- png
- bmp
Anything that comes on a UMD can be played on a PSP, images included. Images don't have to be photos, either; any image files saved in a compatible can be viewed on the PlayStation Portable.
Firmware Compatibility: Different firmware versions are compatible with different file formats. The more recent the version you have, the more file formats you'll be able to view. Use the tutorial linked below to find out which version of the firmware you have, then check the firmware profiles to find out more about file compatibility
