Ab-gota.zip -

Modern "Virtual A/B" updates (common in Android 11+) use compressed snapshots. Instead of needing double the physical storage, the AB-GOTA.zip package only writes the differences (diffs) to the storage, significantly reducing the disk space required for the update.

The most interesting feature regarding this file format is its capability: AB-GOTA.zip

Are you trying to this update on a specific device, or A/B (seamless) system updates - Android Open Source Project Modern "Virtual A/B" updates (common in Android 11+)

These packages often contain only "differential" data, meaning the file size is much smaller because it only includes what has changed since the last version rather than the entire operating system. AB-GOTA.zip