I use WorkFlowy[1] as my starting place for all notes, info, and tech tips. It's quickly searchable and the mobile client is easy to use. I really like the structure of bulleted lists for just about all types of information.
It doesn't really cover your file storage needs, but I think that's a different beast than notes and information. When I need to store stuff like that I dump it on Google Drive which makes search/sync/browsing dead simple/cheap.