How to open Partially synchronized BitTorrent file .!sync files
Have you had trouble opening the !sync file on your computer? What are !sync files? We explain what they are and recommend software that we know will open them.
What is !sync file?
Files with !sync extension can be found as part of BitTorrent P2P download client and represent some partially synced, but not yet fully downloaded torrents.
Partially synchronized BitTorrent file description
File extension !sync seems to be used by BitTorrent, a client for P2P network sharing for one of the default file types.
A .!sync file seems to represent partially synchronized, but not yet downloaded torrent file.
Suggested software to open !sync file

BitTorrent
The official client for download data through BitTorrent P2P protocol