Bought this for my Canon Rebel XSI, had no problems at first but after maybe 15 uses, the card corrupted. I thought it was just the one time, and that it was linked to my low battery, and afterwards I retook the pictures that had been lost, and was able to view them and edit them on the camera. Several hours later, however, when I went to offload the pictures onto my computer, the card said it had to be formatted, and that there was nothing on it. Couldn't view any of the pictures on a PC, Mac, PC laptop, Mac laptop, OR the camera anymore. I strongly recommend finding another card, I know I will be.