What a chubster! I love it!!!! Do you have any plants in there for her? I have Gray's so I don't know much about White's except that, to me, they look like they are wearing plastic fat suits!LOL
When my humidity was too low, my Gray's would burry themselves in the dirt too!
Best of luck and keep posting pics..I just love this kind of frog, too bad I have so many Gray's or I would get a few.