Threema Safe regularly creates an encrypted backup of your basic data:
Your Threema ID (including the public and private key)
Your nickname
Your profile picture
Your contacts (including verification level)
Your group memberships
Android: your distribution lists
Furthermore, Threema Safe backups contain the following Privacy settings:
Send typing indicator
Always relay calls
No thumbnails and screenshots
Android: request incognito keyboard
Threema Safe backups don’t include chats, media files, and profile pictures of contacts and groups. To save chats, please create a data backup or use the export feature.