And to repeat. You have no idea how the file system on android works. You most definitely can delete/backup/etc the photos, screenshots, etc on the phone via USB. You can not easily access app data as thats encrypted and stored elsewhere.
Not if the phone doesn't give permission to lol. I speak from personal experience of a Pixel 3a. Previously connected and all.
I'm a Brit and I know exactly what they mean by a nike tech twink - and that's the first time I've ever heard the phrase.