Minecraft stores worlds, packs, and cache files inside the game. When storage gets full, imports may fail.
How to Check Storage
Open:
Settings → Storage
You’ll see categories such as:
Worlds
Resource Packs
Behavior Packs
Cached data
Safe Items to Delete
Worlds you no longer use
Old marketplace packs
Duplicate packs
Large unused resources
Use Minecraft’s Storage menu — not your device’s file explorer.
Avoid Deleting Files Manually
Do not delete Minecraft folders manually from:
File Explorer
iOS Files app
Android storage
This can corrupt Minecraft.
Tips to Prevent Problems
Keep 1–2 GB free on your device
Clear old unused worlds regularly
Restart Minecraft after clearing storage