Restore app data backup without access to usb debugging Google backup didn't work, and I tried Helium, but you have to connect to usb debugging in order to "enable" it. I have access to usb debugging on the phone i'm backing up, so I have the data, but my new phone only came with a usb-c to usb-c cable, and I can't get a usb-c to usb-a cable for a few more days, but I need my phone to be set up much sooner than that. 

Is there any way I can restore that app data in my current situation?
Since *.ab is an Android adb backup file you will have to do it via adb, but since you don't have the correct cord you will have to do it wirelessly.

Instructions to setup wireless adb:


Download WiFi ADB - Debug Over Air and install
Turn on your wifi and connect your phone and your computer to the same network.
The app will run you through the rest of the setup process.
Once setup try "adb devices" , if this works then you are connected and you'll be able to restore the way you normaly do via adb (but wirelessly).


Hopes this helps you overcome your problem of no cord.