'Insufficient storage' can appear even when the storage meter shows gigabytes free, because app installs need contiguous internal space and generous headroom. Here's the reliable fix order.
- 1Restart, clears temp files locking space.
- 2Clear Play Store and Google Play services cache.
- 3Free real space: our free-up-space checklist (photos offload, WhatsApp media, downloads).
- 4Check app-specific bloat: apps like Facebook can grow 5 GB+ of data, clear their data.
- 5Move media to an SD card if supported; don't move apps (slower, buggy).
- 6Aim for 2 GB+ free before installing large apps or updates.
Tip: If storage 'used' doesn't add up in Settings → Storage, wipe the cache partition from Recovery, miscounted cache is common after updates.