If there is anyone out there curious if this works on Garmin's GPSMAP line of handhelds, then yes! All 32GBs are recognized, and I am maxing this baby out with every map I can get my hands on! No issues at all.Some forums may have you believe there is a 4GB limitation, but there simply isn't (FAT32 - which is the format of the card, has a 4GB limit on FILE SIZE, but that's fine as all individual Garmin maps are under 4GB)