I read this on the FAQs for BitTorrent Sync: Yes, versioning is available in BitTorrent Sync. It creates and stores all the old copies of edited files for the period of 30 days (this default period can be changed in General advanced preferences - sync_trash_ttl). The versions are stored in the hidden .SyncArchive directory within your sync folder that you can open by right click on the sync folder and choosing 'Open SyncArchive'. Old versions of a file are marked by adding numbers to its name, where the file with the highest number is the latest. However, I am testing this out, and I only ever see one file in the .SyncArchive folder when the file is resaved with changes - there are no numbers appended or anything. Do I need to turn something on in the preferences/settings somewhere? Any help would be appreciated.