How can I find the items over a particular size?
I want to locate all items that are bigger than 500 KB - how can I do this?
The easiest way is to use a Collection (earlier known as "Smart Folder"). If you need to do it with every object, not just content items, you can do this from ZMI → Find → Advanced.
In the expr field, enter get_size() > 500000 - and press search. This will search all subfolders and return objects that are larger than 500 000 bytes.