i cant find it pls can give me link of it pls pls pls pls pls pls pls pls pls pls pls pls pls :p xp
Try creating a new game (and saving) or redefining the game settings, as they would automatically create the new folder for the game files to be stored.
If not, just create the folder (and sub-folders) by yourself in 'My Documents', like this:
GTA San Andreas User Files
--> Gallery
--> User Tracks
'User Tracks' is obviously where u put ur MP3s or MP3 shortcuts.
If that still doesn't work, try a Search of your hard-drive for the folder 'GTA San Andreas User Files'. It might be stored somewhere else, for some strange reason.
Hope this helps!