Is it safe to connect phone to PC via USB?

Question

Android

A smartphone and a PC are different devices with their own data, and when connected, in theory, there should be, let's say, a buffer zone between them. There should be a distinction between system data and user files. Does it exist? Is it possible to prevent changes to Android system files when connected to a PC via a USB cable to share files?

Answer 1

Is it possible to prevent changes to Android system files when connected to a PC via a USB cable to share files?

To share files, you need to get permission on smart.
To install applications from a computer, you need to enable usb debugging and allow the connected computer to connect.
Who will forbid? OS Android, an axis on a computer or an application of some kind?
Everything is solved by practice, delete the file in the system folder, see the result. profit.
In this case, the next question will be - how to revive the brick.

Answer 2

Yes, there is a division of rights.
There is a User and Admin (root)
In the vast majority of stock firmware, the user does not have root rights.
And without them, the system partition is read-only.
All you can mess up is user files and installed
app data. Even driving a smartphone into a cyclic reboot is a task in this way.
In short, everything rests on a counter question - do you have a rooted smartphone?
Not? Well, do not worry - it is extremely unlikely to corrupt it via USB.