Quite simply, BitTorrent is corrupting some of the original files it syncs. Here is what is happening: On Computer A, I have file123.xxx. After BitTorrent sync, I end up with: file123.xxx.!sync file123.xxx!sync.DSN file123.xxx.!sync.ND On Computer B, to which the files are being synced, I end up with file123.xxx file123.xxx!sync.DSN file123.xxx.!sync.ND On Computer A, the original file disappears and cannot be opened even after I remove the added extension. The original file that has been synced to Computer B is still functional. This happens for different file types and in diff