I'm continually running low on storage space so I'm looking at things that can be eliminated that aren't being used. If I go to all apps then Downloads it shows me list of child of which are .apk types. I'm assuming these are inactive files that were originally downloaded by the market or perhaps some other means for the purpose of installing app or something similar? so I'm wondering if its safe to delete these or are they active files? Or, are they just the remnants of other activities and expendable?