Hello,
my device is running on Mudita OS K 1.3.0 and I installed a 512 GB microSDXC card Samsung Evo Plus three weeks ago, which works pretty well. The file system is exFat.
But yesterday something happened. I did power off the phone and removed the SIM card tray to use the SIM card in another phone for testing. After tests were finished, I installed the SIM card tray back in the Mudita Kompakt with same configuration of SIM card and microSD Card as before. Then I did power on the phone and went for a walk. I noticed that my whole music was missing and I could only listen to the preinstalled songs from Nick Lewis. I checked the settings and saw, that the microSD card is recognized, but shows 0 bytes of size. The microSD card itself was never put in another phone or removed while the phone was powered on. So the file system should not be corrupted.
I later put the microSD card in my Computer and saw that all data was available, my whole music was there. But I was not able to get it working again with Mudita Kompakt, it always said the size is 0 byte. The only thing that worked was formatting the microSD card again with exFat and now it is recognized by Mudita Kompakt like before.
I now tried to run in this error intentionally, but wasn’t successful. So at the moment I am not able to tell you, what happened. Did someone from the community had the same issue before and maybe knows the steps to force this problem, so that it can be fixed? Thank you,