How to disable Android System notifications - DRIVING ME BATTY!

[Android Central Question]

I pretty much like everything I've been able to customize my LG G6 to do, EXCEPT for not being able to disable the SUPER ANNOYING Android System notifications (these are notifications like "File transfer - tap to change USB options" and "USB debugging on". They are the only notifications I cannot turn off. I looked in the apps and didn't find anything, likewise with the settings.

Can anyone help? Thank you!