At first card worked fine, it was brand new out of package. Tried to download some aps got message no card, then damaged card. Got another brand new card out of package, different brand, same error message, damaged card. It then also said unmounted card but I can't find how to mount it. I would appreciate any help to fix this, I like the tablet and would like to use it more but you really need the card for most activities. Thanks so much, just found this forum and think it's a great resource.