I've bben looking for similar issues on the net. This one is unresolved but report https://bugzilla.redhat.com/show_bug.cgi?id=1229018 a comment describes what I see quite well regarding the error message:
"- when a drop fails in Nautilus and I use cut/paste to move a file or folder, I then get a "can't access [source folder]" dialog box a long time later (like 1 or 2 minutes, which is an eternity in UX terms) as if the mouse-based drag-and-drop got stuck all that time." ** Bug watch added: Red Hat Bugzilla #1229018 https://bugzilla.redhat.com/show_bug.cgi?id=1229018 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1835649 Title: Nautilus utterly unreliable with drag & drop To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/1835649/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs