Bought for my Garmin Oregon 300 to enlarge the storage capacity for maps, waypoints and points of interest, the SanDisk Micro SDHC Card 4GB. Was a bit confused because of the many special terms (Micro, SDHC and div. Stories for compatibility). But everything worked right away - open package, open device, insert card, turn on - as it should be. Also for the memory expansion of mobile phones, the product is well suited.