I don't get it, this is not a house with limited square footage. Discarding is of almost zero importance, in fact, you have it logically backwards because disca

I don't get it, this is not a house with limited square footage. Discarding is of almost zero importance, in fact, you have it logically backwards because discarding incurs a cost of investing your precious time to make a decision. While retaining only requires you to have an amorphous blob somewhere, a non-event. This is especially true for things tens of megs to a few gigs. Of course not yet true for 4K videos, but we are approaching that point not year by year as cost per TB approaches 0. By saving stuff, you future proof the high possiblity that it becomes completely unavailable anywhere online and you have the last copy. And you can easily find it by search, I have this happen all the time. In many cases the audio cassettes that accompany an old pedagogic text have been digitized by one person who shares a zip one time and then the link dies forever. Ten years later when I finally free up time to study the material, it will be too late. The important skill: don't download or even browse crap you certainly won't use within your lifetime. It is a time sink. Develop a strong preference for only looking for things you'll immediately begin studying or have a concrete plan to study in the coming 6mos.