The commonly used pictures are JPEG, BMP, and GIF.

The first two are similar. GIF is a dynamic and moving picture!

Music includes: MP3, WMA, RM, etc.

Generally, MP3 is used more often and can be played on many things.

WMA can be played on some MP3 players, but some players cannot. In addition, this format cannot be played on mobile phones!

RM formats are sparse.