https://www.theverge.com/2017/12/27/16821202/nintendo-delaying-64gb-game-cards-developers-2019

Nintendo is delaying the delivery of 64GB Nintendo Switch cartridges to outside game developers until 2019, reports The Wall Street Journal, which cites several people familiar with the matter. The WSJ notes that Nintendo planned to make the 64GB cartridges available in the second half of 2018, but pushed the date back due to technical issues. The sources said the move has brought “slight disappointment” to some developers, especially US publishers who often need the larger capacity for their data-heavy games. The WSJ says those developers now “may wait” for the larger cartridges to be available before releasing those games for the Switch.

The Switch’s game cartridges currently max out at 32GB, less than the 50GB Blu-ray discs used by the Playstation 4 and Xbox One. The Switch only comes with 32GB of internal memory but is expandable through microSD cards. Larger games on the Switch, like Doom, require a substantial download even if you buy a physical copy, because the entire game can’t fit on a single Switch cartridge. The Legend of Zelda: Breath of the Wild for example, takes about 13.4GB to download to the Switch. Larger capacity cartridges would help alleviate the need for an extra microSD expansion card and the internet downloads required by these more demanding games.