I have an QNAP TS-210 NAS and it seems, that there's a Debian Linux on board. I've installed Midnight Commander there and have been using it successfully for years. Today I spotted something weird.
I have to move a large collection of movies (around 130 GB) from one folder to anther. Movies are split into many subfolders. Whenever I enter any particular folder, select all files in MC and press F6 to move them to destination, everything is fine. But, when I attempt to move entire subfolder (destination has it as well, but files inside are different, so there is not overwrite in any case), process takes very, very long. It actually looks like my NAS would be doing a copy, instead of move of this file.
Is this normal condition? When I'm doing the same operation on Windows, move process always is very, very fast, no matter, if I'm moving entire folder or only its contents.