Q&A for How to Remove a Flash Drive from a Windows 10 Computer

Check if an application, file, open document, music or video file or any other application is in use and close it. You can also run the Task Manager to "kill" any processes used by the device. Be careful—ending tasks doesn't damage your computer per-se, but it can lose unsaved files and corrupt existing open files if you close a program that is using them, and it can cause your computer to do an emergency shutdown. It won't cause permanent damage unless the program is doing something like flashing the BIOS (in which case, you shouldn't be removing flash drives!).

The system tray isn't something that you can download. It should be on all Windows 10 computers in the right hand corner. It looks like this ∧.

Usually you can just take the USB Flash Drive out without safely removing it. Only when you are doing stuff on it like moving files from or to it, or watching movies from it. Even then, there is a low possibility that it's going to become corrupted or something.

The touch pad and/or L & R buttons are malfunctioning. Consult your device manufacturer to fix this.