Hey, so Recently I purchased the EZ flash IV for my GBA. I took out my Micro SD card and plugged it into my computer. As everyone says, "the format of the Micro SD must be FAT". As I went to change the format of my Micro sd to FAT, I soon realized that my card had no option of the Fat format, confused I did some research online and found other people with the same problem but no solution. I researched more and found out that only 2gb micro sd cards or less can run FAT, other cards require FAT32 or exFAT. I had a 8gb micro sd. Eager to get my EZ flash running I searched online for stores that sell 2gb cards online, surprisingly the only place I found that sold them in stores was Walgreens. I popped in my new micro sd, changed the format, and used the client to convert the files, the answer was satisfactory. My EZ flash was up and running roms. I thought I should share this with anyone that had the same problem.