I'm having issues with my 64 GB micro-sd card that I can't find a solution to solve this problem.
I've reformatted from windows 7 using windows solution as well as the format software offered by the SD-card organization. I've also tried repairing and repartitioning through Aparted for Android. Nothing is working... The strange thing (to me at least) is that I can save things to the card itself. The only thing is, when I go into the storage app in Android (by the way I'm on CM 12.1), Android only shows a gray bar and isn't able to identify what is on the card. Also, certain apps like teamviewer simply operate as if there is nothing in my SD-card slot.
When I followed the directions in this question, I got as far as the unmount step, at which point terminal tells me that it can't find the unmount I'm trying to point it to (/dev/block/vold/179:33). What the directions don't mention in that link is what one can do if it can't find the device. Can someone please give me a hand with this? Thanks so much.
*In case anyone is wondering, I do have busybox installed.
*I also just noticed that when I go into storage, I don't even have an option to dismount the card...only erase.