Please perform the below mentioned steps to resolve the issue:
1. Restart the device Press & hold the power key > Tap on Restart > Tap again to Restart your phone
2. Remove memory card Before removing the memory card, first, unmount it for safe removal.
On the Home screen, tap Apps > Settings > Device maintenance > Storage > More option > Storage settings > SD card > Unmount.
For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).
