Doesn't it max at 10gb
There's actually no limit on this. It's just that you can only get 10GB each purchase, so you can just buy 10GB over and over again to get infinite space if you have the money.
Use a program to mirror whatever page/site /k/ is archived to, then upload the files after getting enough space to hold them all.
I'm sending the novels I've written and that I'm working on, as well as a handful of other books in .epub format that have influenced me throughout my life.