A vigilant user at Reddit has noticed that The Legend of Zelda: Tears of the Kingdom sets a new record for download volume – at least as far as Nintendo titles are concerned. So you are clearly ahead with 18.2 GB Fire Emblem Engage (13,8 GB), Xenoblade Chronicles (13.7 GB) and even the direct predecessor, that is The Legend of Zelda: Breath of the Wild. It “only” comes to 14.4 GB.
The Legend of Zelda: Tears of the Kingdom Coming exclusively to Switch on May 12th.