Filesharing has always been an important part of Freenet, but it is not very good at it in two critical ways:

Large files do not remain retrievable for very long. Even small files can disappear in weeks. This means that Reinsert-on-Demand is a popular option implemented by Frost and implemented manually by file sharers everywhere on Freenet.

Currently Freenet itself does not provide any useful file searching system. We provide Library, which searches freesites, but this is based on centralized indexes. Ideally we would have a distributed, spam resistant, fast Web Of Trust-based search system.