Every month I upload specific files to Dropbox, to store as an archive. Starting in February 2024, files from one specific folder were moved instead of copied. Files from other folders are being copied, as expected. I noticed that the source folder was empty and downloaded the previously uploaded files, but now I can't get the new files to upload. A couple of times, it looked like it was going to work, but then I noticed it was going to move those instead of copy them, so I didn't complete the action. The rest of the times, I have the files highlighted, dropbox says to 'drop them here', but nothin happens.
I am on an up-to-date laptop using windows and chrome. Any ideas what's going on?