Android / Google backup


Android Enthusiast
Hi all, I'm wondering if anyone has in depth knowledge of the android/google backup.
When I enable backup it says that it will sync local folders to Googles servers but unlike MS One drive where I can view all of the synced content I seem unable to view the content.

This leaves me with two questions.

1. How do I know my files are safely synced in the cloud?

2. Once they are how do I delete them? A file I don't want in the cloud might get synced and then I can't delete it.

Ideas, advice please :)

Cheers all :)