I bought the fastest 32 GB SDCard : Sandisk Extreme USH-I card ( Ultra HD )
Then, I formatted it as Internal Storage ( I have Android 6)
Now, my phone reboots sometimes, and also my sdcard is unmounted frequently.
So, a lot off apps doesn't work, because they need data on the sdcard.
The only way I found to fix it, each time, is to extract phisically the SD, and insert it again... this works for like 2 hours....
Is there anything I can do about it???