Music
MP3 files are generally used for music files. MP3 files are compatible with the PS3 and can be accessed through the "Music" icon on the PS3's home screen.
Video
AVI, MP4, TS, M2TS and MPEG are the files generally used for video streams on the PS3 gaming console. These can be accessed through the "Video" icon on the PS3's home screen.
Pictures
JPG, PNG, GIF and TIFF are used for viewing pictures on the PS3. These can be accessed through the "Pictures" icon on the home screen.
Folders
ZIP and RAR files are used as browsing folders on the PS3. This means that you can store all of your music files in a ZIP folder and view them on the PS3 home screen. This allows users to categorize their media.