The Telegram messaging application apparently stores messages on its servers (at least - that's what it says in answers to this question here on the site). Is that everything it stores or forwards to a third party? Let me be more specific. Does Telegram store or forward...
- Messages in groups?
- Messages in bi-partisan chats?
- Bi-partisan audio conversation meta-data?
- Bi-partisan audio conversation contents?
- Content which has been changed by edit, or deleted?
- Search terms?
- Anything else?
If there's storage in encrypted form for which only the end-user has the key - please mention that.