After I have upgraded from Open OS 16.06 to 16.08 successfully, happend follows…
All folder with files (except "Android", "Lost Dir") disappeard from SD Card. I create a new folder with Amaze. After reboot folder gone. I connect via USB with my PC and create a new folder. After reboot newly created folder gone. I create a new folder via Open Camera. After reboot gone. Changed 3 other SD cards. Same behavior. I installed SDFix app which mentioned in this forum says that my SD card already writable, there for no need this app.
Now, Fresh Open OS. No Gapps. No Exposed. Still same problem. Created folders gone after reboot.
Any ideas? Help?