Using samsung galaxy s4 and a sandisk 64 gig micro sd card.
The card is not corrupted. It runs fine on other devices. when I put it in my gs4, phone shows the storage as usual. I can browse thru sd card folders and view images. But can't write anything ( can't create folder, can't put data in it). When I try to create folder , this message pops up (see next comment pics).
Any solve? TIA