Rooted 8GB N7. I ran Root # All Data2SD app. I hoped it would see my USB flash drive storage and make it available, so I told it to make 15000MB available. It went merrily along to 4223MB, ran out of space, and aborted.
My N7 looks outwardly ok, but I can't download apps. I think the app created a partition, but failed to successfully mount it.
I get 3 menu options. Create Storage says storage file sdcard/rappsd/storage already exists. Mount and unmount leave me with a screen saying
Size: 8.0 KB of 4223 MB
Storage is not mounted.
If I hook the N7 to my laptop, Windows Explorer sees 0 bytes free of internal storage.