Top notch stuff. Well done!
Anyone else think the increase dialog is a bit wierd? It shows how much space is currently used and how much quota is being requested. It doesn't show what the current quota is.
A user might bulk at being asked for a 4GB quota when the app was currently only currently using 2GB. They may not recall that they had previously allowed 3.5GB.
Surely how much quota has already been granted is a relevant peice of data to be presented in this dialog?