the only issues i have had with cards is not being able to view them with my digital camera. on a couple of occaisions my Moultrie 3.1 said i had pic's but when i took the card out and put it in my digital camera it said i had no pic's. i took the card home and put it in my desk top and i could view the pic's. so far i am unable to view any of my pic's on my Moultrie I40 with my digital camera, i have to view them on my desk top. i have also formatted them multiple times with no luck on the I40.