Aaaa crap. I think my Samsung card just took a dump. I just started to not being able to play some songs that were on it and just some general weirdness when taking picture's and such.
Took it out of my phone and put it into my laptop, yep. Files corrupted (thank doG for OneDrive backing up photo's). I just got done doing a long format on the card to exFAT (really not recommended) and it took forever. Trying to copy photo's back and it's taking forever (compared to before).
I think I might have to make a run and pickup a new card I think I might spend the extra $$ and try the newer SanDisk Extreme cards. SDSDQX-064G 80/50 MB/s, or SDSDQXL-064G 45/45 MB/s card
Avoid Samsung like the plague! My best friend has had several devices made by them and has had nothing but a string of bad luck with them. The latest thing to crap out is a hard drive in one of her laptops. Definitely get a SanDisk. I've always used SD cards by them and never had any issues. The new 64GB card I got is running like a champ in my 810!