Deleted files come back all my themselves on External Drive

I am having a weird problem with lots of jpg files that I deleted months ago and emptied the recycle bin dozens of times since deleting the files, those are mysteriously reinstated into their original folders on the external drive!! all they are are jpg files that after I print them, I delete them permanently. but after about 3 - 6 months those files are back into the folders!! running Windows 7 Ultimate

Run a full scan with Malwarebytes on all drives, followed by SuperAntiSpyware - decline the trial versions to just use the scanners.

Then move the data off the external and wipe it with Diskpart Clean Command, repartition in Disk Mgmt.

If these fail work through the Troubleshooting Steps linked in my signature pic below, reporting back results.