Borderlands 3 physical requires 62GB of downloads per the back of the box
Image from this ebay auction:
https://www.ebay.com/itm/355081838295
A post yesterday talked about how the eshop says the download is 6.7GB. But the eshop also says that a lot of the included stuff are separate downloads. I'm not happy about 62GB of downloads on a physical game, but I think it's more realistic for Borderlands 3. Eshop link:
https://www.nintendo.com/store/products/borderlands-3-ultimate-edition-switch/
I think the 6.7GB is probably the same as whatever is on the cartridge, but with all the extras or updates or whatever it will be 62GB. Edit: Well I guess if the 6.7GB is on the cartridge that would make the download version 68.7GB total...