Yes. Both Switch units must be on exactly 1.4.4.9 . If one is on 1.4.4.8, you cannot play together.
If you own a physical cartridge of Terraria (XCI), the console will automatically prompt you to download the latest update (NSP) from the official servers. The search for "Terraria Switch NSP UPDATE" usually arises from users attempting to manually install updates outside of the official eShop ecosystem, often due to homebrew usage or preservation efforts.
You own a secondary, offline-only hacked Switch and a legally purchased cartridge, and you are dumping your own update for backup purposes (legal in some regions like the US under fair use, but still against Nintendo’s TOS).
Yes. Both Switch units must be on exactly 1.4.4.9 . If one is on 1.4.4.8, you cannot play together.
If you own a physical cartridge of Terraria (XCI), the console will automatically prompt you to download the latest update (NSP) from the official servers. The search for "Terraria Switch NSP UPDATE" usually arises from users attempting to manually install updates outside of the official eShop ecosystem, often due to homebrew usage or preservation efforts. Terraria Switch NSP UPDATE
You own a secondary, offline-only hacked Switch and a legally purchased cartridge, and you are dumping your own update for backup purposes (legal in some regions like the US under fair use, but still against Nintendo’s TOS). but still against Nintendo’s TOS).