Exactly Dalchina.

180735

And if the drive is constantly disconnecting/reconnecting, Explorer will continue to open every time the drive reconnects.

Does Explorer open to the external drive when this happens? If so, then you need to do some troubleshooting:

Connect the external drive directly to the computer. Verify the problem is gone. If...

If you have Windows setup to "open folder to view files" whenever you plug in a drive, then, if your drive (or cable or USB port) is going bad, and disconnects/then reconnects, that will happen.