err no the old one you might want to keep for now too, since im not sure which files got moved already and which are not
ok now for starters, your first attempt moved files to the first backup folder, which are now not being copied because they don't exist anymore on the drive you moved them from
the actual running command is doing a copy of the rest of the files which are existent on that drive you wanted to backup
so you might want to keep both folders for now and maybe you have to take ownership of those folders later on