Hi. LG G4 with 32G Ext SD card here. I've set up my camera to save pics to SD card. I have another app, OI File Manager, which allows me to create/remove files and directories. If I try to delete a pic on my ext SD card using OI, the phone doesn't allow me to delete the pic. It's almost like the phone thinks the ext SD card is mounted "read only". Any suggestions? TIA