Hello
I am having the same issue: mine uses 85MB for the App and 2.63GB(!) for documents.
Brave takes ages to start up.
What I tried:
- I closed all tabs,
- deleted the private data except the saved logins
- restarted the iPhone
No success.
PLEASE HELP - otherwise I must remove the app and sadly reinstall and enter all my logins again!?
An have a good 2020 