Let's say you were trying to look into your SD card on your computer, then suddenly the drive's like,

Window that presents the following: Location is not available. E is not accessible. The volume does not contain a recognized file system. Please make sure that all required file system drivers are loaded and that the volume is not corrupted.

My friend just went through this issue. Basically I told him to run: chkdsk E: /f on Command Prompt ran as administrator.

...and poof! It works ✨