Updating a growing and changing site is not that easy as NOF
tells you. Site maintenance (remove unused assets etc.) is not working.
OK they are no longer in the assets-list but thats all.
Removed albums.... the same.

Manually removed unused pictures/albums etc. saved me today
12 Mb server-space. From 45 Mb back to 33 !!!!! where there
are more/bigger pictures added.