New
#11
Try getting a whole different brand of them since, seems all 3 are having the same problems. I've had many SD cards and I've only had a problem one time, that was it. I transfered hundreds of songs from my computer to a microSD card, then slipped it into my Smart-phone. I've been using SD's Since PSP came out and then the microSD's since I really got into the smart device craze. Still no problems and I only ever formatted them once in a blue moon, we are talking years. I say try it on a buddies system to rule out if it's the computer just not playing nice with the Micro SD.