My daughter got the same message on the Switch, but there was ample space on the system/SD card to accommodate the 100mb storage Minecraft wanted to download a texture pack. Deleting some worlds/textures/packs from the system using the data management tools in game fixed the issue, but this will happen again since she plays a lot and has a lot of resource packs.
I found a reddit thread (https://www.reddit.com/r/Minecraft/comments/99ppex/data_storage_issue_on_nintendo_switch/) which says Nintendo imposes a 2GB restriction per game per profile. Has the Minecraft team tried to apply for a waiver from Nintendo to increase or remove this restriction?
My daughter got the same message on the Switch, but there was ample space on the system/SD card to accommodate the 100mb storage Minecraft wanted to download a texture pack. Deleting some worlds/textures/packs from the system using the data management tools in game fixed the issue, but this will happen again since she plays a lot and has a lot of resource packs.