In my youth, I probably downloaded hundreds of gigabytes from wuarchive.wustl.edu, ftp.cdrom.com, metalab.unc.edu, and the like. Over a dial-up modem, no less.
Before I had local Internet access (i.e., long distance calls), I used the various "FTP by e-mail" services with my free "Juno" e-mail account (they had toll-free numbers for access!).