Have a hidden flag for each file that lets vuze know if even a single byte of a file has been downloaded, If not when vuze is asked to move a file it only move partial or completed files and does not move empty files, instead it writes a new ones and deletes old ones ".en mass" after transferring all the others. Also each torrent has a unique directory under the "vuze download" directory, I'll just call it torrent's directory for clarity. When right clicking on the torrent in the library or anywhere else, there should be a move option to move the entire torrent. When moving the torrent it has a check box for including the torrent's (unique to that torrent) directory in the move, otherwise it only moves files and sub-directories within that torrent's directory. Also why can't Vuze move files a quickly as you can under the OS. The OS moves them much quicker but of course screws up Vuze's ability to track the files.