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Known storage limits

Android#

AsyncStorage for Android uses SQLite for storage backend. While it has its own size limits, Android system also have two known limits: total storage size and per-entry size limit.

  • Total storage size is capped at 6 MB by default. You can increase this size by specifying a new size using feature flag.

  • Per-entry is limited by a size of a WindowCursor, a buffer used to read data from SQLite. Currently it's size is around 2 MB. This means that the single item read at one time cannot be larger than 2 MB. There's no supported workaround from AsyncStorage. We suggest keeping your data lower than that, by chopping it down into many entries, instead of one massive entry. This is where multiGet and multiSet APIs can shine.