If you have not changed any of the settings then notability should be automatically backing up onto your google drive.
log into your sofo kitchens gmail account, then click on the upper right corner there’s a thing with a lot of tiny squares
click on that square thingy
you’ll see a lot of options (mail, drive,calendar etc)
click on drive
once it opens click on the folder called “notability”
BOOM! you’re in!
I included a video on how to do it