I was trying to use Partition Manager to Partition my SD card so that I could run applications on my MT3G. Anyway, I needed to convert my SD card into two partitions and the instructions told me to use this product. The first was a FAT file system and the second was an EXT2 file system. I am running Windows XP, performed this operation. Partition Manager forced me to reboot, then brought up the PM screen, where an error was encountered. I proceeded to boot into Windows and now PM says that I have two partitions on my SD card, but that the EXT2 one is showing as "Invalid" under the File System type. Did this just ruin my SD card? I can't delete the partition or repartition it or anything. Please help!!!!