Just thought about this: make sure you are using an SDHC capable card reader with your computer. The older SD card readers do not always work with these higher capacity cards. Also, not all software in PC's will work with SDHC cards either when you format them. I've got a link on my work PC to some free software that was written to format the larger SDHC cards. If you don't use the newer software you could turn an 8GB SDHC card into a 2GB card...