Storage space is not a problem, especially not on the order of terabytes. If you want to download all of libgen on a cheap drive, perhaps limit yourself to epub files only. No one needs all of libgen anyway except archivists and data hoarders.
Yes, that makes you a data hoarder. Normal people would just use one of the many other methods of getting free books, like legal libraries, googling it on Yandex, torrents, asking a friend, etc. Or just actually pay for a book.
My target audience is not normal people though, and I don't mean this in the "edgy" sense. The fact that we are having this discussion is very abnormal to begin with, and I think it's great that there are some deviants from the norm who care about the longevity of such projects.
I can imagine many students and researchers hosting a mirror of LibGen for their fellows for example.
