Salutations gumonx,
To clarify, are these files in the Trash in Finder on your Mac when you receive these messages or are they showing up in an attempt to move the files to the Trash on your Mac?
If it’s happening in an attempt to move the files to the Trash on your Mac, can you confirm which format the external hard drive is in that you’re moving files from? You’ll be able to find that in Disk Utility by clicking on the hard drive on the left.
We also noticed that at least one of these folders you’re removing is quite large, at 171.77 GB. For isolating purposes, could we test with a smaller folder or file and see if the issue persists?
Thanks.