I'm running viper 1.8.0 on my M8 and I've had a 128gb card in there since I got the phone last June. This afternoon, all of a sudden, the system apps stopped reading the SD card. My gallery and music apps say there's no files. I initially thought my card got wiped somehow, but looking in the storage section of the settings app, it still shows 20gb used. Checked in ES file explorer and all files are there and I can view them, so they're not corrupt. I connected to my laptop and backed up the SD card and formatted from the phone, and put the files back on and still won't read. However, I tried taking a photo and then that one shows up in my gallery! But that's it! Even though it's in the same folder as the rest of them. What's going on here?
xda-developers