If you accidentally delete a category that has pictures in it what happens to the pictures? Does the same thing happen to albums?
never mind I figured it out by deleting one and everything is fine.
As you found out, deleting a category is fine... Any albums under it move up to higher category (or no category)
Deleting an album however, will delete the files in it... And does warn you.
Very nice way to handle deletes. Kudos goes to the programers/coders .