File-Extensions.org forum

Hi,
I found .bts file extension used by BitTorrent Sync app and service http://www.getsync.com.
Used for all files unfinished downloads by synchronization process. Something similar like .!ut or .part, or .crdownload file extension.
The temporary file gets size of original synced file and after successful sync it is renamed to its original file suffix.

Thanks, we have added a new entry for this extension

http://www.file-extensions.org/bts-file-extension