The red X icon that shows up next to your files on Windows is actually a OneDrive warning sign. It indicates a syncing error, ...

it may happen that File Explorer does not display the offline file icons correctly. You can identify an offline file by the overlay that shows an “x” character in the lower-left corner of the ...

You can also access the app drawer by tapping its icon on the home screen. 2. Tap My Files (or File Manager). Quick tip: If you don't see the My Files app, tap the Samsung icon with many smaller ...