sir have u used usb debunging ever @JohnRennie

USB debugging? No, I haven't.

What would you use that for? Hardware like an Arduino?

please have google sir

Ah, for developing phone apps?

OK. I have used USB for updating the OS on a phone.

is it safe to install external software

for this

1. Google's adb software

2. the drivers for your phone

Are you planning to develop an app for the phone?

yes

I have never done this so I can't say what the best option is, but I suggest you start by using Google's development software. Give me a moment and I'll Google for it.

I think it's Android Studio.

There is an introduction to Android development here.

ok