Not file-friendly for files over 100MB.

I have tried multiple applications including Skim, PDF Easy, Preview and recently tried PDF Reader X. They all have their ups and downs, but this is the most user-friendly until i try to annotate my text-books that are well over 100MB and it tried to auto-save every five minutes. I would like for it to have an option to turn off auto-save and for it to simply save the annotations I added not re-copy all of them because it takes 20+ minutes to save now. Please fix

Mike Meme about PDF Reader X - Edit Adobe PDF, v1.5