I now have tons of room for music, videos and photos. The SD card formats to about 59 GB, which is normal for a SIII - The phone's operating system uses up several gigs of any SD chip.  It came pre-formatted (I think) but I went ahead and re-formatted it just to be safe.  Formatting only takes a few seconds.  There are numerous Youtube videos on how to install/format an SD chip for this phone - take a look if you are a newbie.