https://wccftech.com/luigis-mansion-3-final-file-size/

Luigi’s Mansion 3 is now available for pre-load on the Nintendo Switch eShop, and the game’s file size has been revealed.

Like the soon to be released The Legend of Zelda: Link’s Awakening, the new entry in the series by Next Level Games is not going to require a whole lot of storage space, as it will only require 6.3 GB. Additionally, all those who pre-order the game before October 30th will receive double My Nintendo Gold Points which can be used on the eShop to get discounts on most games.