Pen drive showing empty even data exists inside it

Problem : Pen drive has data but it is showing empty.

Solution : Sometimes data remain hidden so make sure files are not in hidden mode.

To show hidden files
Computer --> Organize --> Folder and search options --> view --> Show hidden files, folders and drives

Check your pen drive if still it is not displaying data then follow below steps :

Step 1: Click on "Start" --> "Run" or "win+r"--> Type "cmd" and press Enter.