Help with strange files automatically saving on SSD

Hi!

I've recently encountered something strange going on when i connect an external SSD to my mac. I've been using the same SSD for a long time and have never had this happen to me before so wanted to see if anyone knew a way around this issue.

When i recently opened the SSD files the four documents/folders highlighted in red below had somehow found their way onto my hard drive.

Each time i delete these files my and eject my SSD, the next time I plug it in I'm prompted to use the device for TimeMachine backups?! another thing that's never happened before.

I didn't place these files here intentionally and would love to know how to get rid of them, without them spawning back onto my SSD each time i plug it in.

Any help will be much appreciated. Thanks in advance.