Third solution: Unmount and mount the SD card on your LG G7 ThinQ. Application errors might have affected the phone’s SD card system reader, thus causing it to fail.

How to fix an LG V35 ThinQ smartphone that cannot detect SD card [Troubleshooting Guide] By Harold Hisona July 20, 2018 August 25, 2023 The LG V35 ThinQ supports microSD card types for extra storage.

This article runs through how to move apps to an SD card in Android, just in case you'd like to free up space on your smartphone for more important things.