AppStack application template (20 GB)
Writable Volumes template for user installed applications (10 GB)
Writable Volumes template for user profiles only (10 GB)
Writable Volume for user profiles and user installed applications (10 GB)
The standard template for creating Writable Volumes is by default configured to be 10 GB is size. Although this is thin provisioned, and as with the AppStack sizing, it might not make sense to use a 10 GB disk if you have users installing just a handful of small applications that are only a few MB's in size.
As with the resizing of AppStacks, the process for resizing and customizing Writable Volumes is exactly the same. The key difference is the location of the templates in the datastore, and also there is a separate tab in the App Volumes Manager console for importing the new Writable Volumes templates.