Have this SD card bought because my navigator Falk F 12 can not read SDHC cards and I wanted to upgrade the memory cards from 2 to 4 GB. This SD.- card can be easily read by older digital photos and computer drives and works on all devices that a SD / SDHC card slot have. Can this 4GB card only recommend, fast processing of data and my recommendation would be to reformat the card before getting on the device or the PC where it is to be used.! Greeting Klaus