A few months ago, when i bought my Garmin handheld, i could find no other MICRO sd cards other than what Garmin sold. Plenty of standard sd cards, but no micros. i bought the inland lakes micro and then sent it back after finding i could not upload the maps to my computer. waypoints and routes, yes, but not the maps themselves. they sent me the inland lakes CD which i installed on the computer and then transfered what maps i wanted to the handheld. now i have detailed maps on both. you can buy larger micro sd cards, i got one on the net for about $25 which has 1 gig memory. hope this helps. jm