The stats page plugin could show some more information:

• number and total size of uploaded files and images
• number and size of statics
• most viewed entries (only when PostViews plugin is active)
• total size of the FlatPress folder
• ...

And maybe a little CSS bling-bling would make the output more charming to the eye ;)
Also, sizes should be displayed with human readable units (KiB/MiB/GiB) instead of plain Bytes.
And with all the additional info above, the plugin panel might better be moved from the "Entries" section to the "Plugins" section.