Here's the scoop: I record a lot of videos training dogs. It takes way too long to back up the videos onto the cloud, so I thought to buy a USB adapter, save them to the sd card plugged into that, and on the other end is a regular usb port i can plug into my computer and save them to my OneDrive that way. My initial sd card was a 128gb SDXC. Seemed to work okay for a while, but now it seems at random times both my S6 and laptop will say it is corrupt and needs to be formatted.So i format it, it may or may not work for a while, and it tells me to format it again, It's an endless cycle. Bought a 64gb sd card thinking maybe 128gb was just too much, but the same exact thing is happening. It will let me save a video or two, but then all of a sudden it is unsupported/corrupt on both my phone and laptop. PLEASE HELP ME!