Question [Q] Backing and cleaning my ROM with a broken screen..

Hello guys! So here is an interesting situation I would like help in.

I have a Galaxy S4 with a cracked screen. It seemed to hit hard that I cant see anything, like when I press the power button, a green flash comes and disappears.

The system itself works perfectly as I still see the notification lights and the menu/back button lights work perfectly but the screen seems done for.
I want to backup my internal ROM and then wipe it so no data can be stolen. I have a Rooted Android 4.2.2 (the original Samsung ROM, I think its called Touchwiz?) with ClockworkMod Recovery.

Is there anyway I can backup my current ROM and files and wipe the device? Maybe with a PC via USB?
Thank you!