Join Date: Oct 2011
Location: Montreal, Quebec
" Since the cards use the FAT32 file system I would suggest a 4 GB card and no bigger since the FAT32 file system has a 4 GB file size limit anyway. "
I don't think its limited to 4 GB, Garmin's FAQ says up to 16 GB. I'm using a 16 GB card where I have stored 2 additional maps, plus music with no problems whatsoever. Also, I'm way past 4 gigs on the card.
edit: did some research, and a FAT32 file system can hold up to 2 or 16 TB depending on the sector size. However, as Gino points out a single file (e.g. map) can be a maximum of 4 GB, so if you are only storing a single map, 4 GB card is the maximum you need. If you want to store more than one map, music, etc, it may be worth it to get bigger.