[Home](./index.md) > [@snowplow/react-native-tracker](./react-native-tracker.md) > [EventStoreConfiguration](./react-native-tracker.eventstoreconfiguration.md) > [asyncStorage](./react-native-tracker.eventstoreconfiguration.asyncstorage.md) ## EventStoreConfiguration.asyncStorage property The Async storage implementation. In environments where AsyncStorage is not available or where another kind of storage is used, you can provide a custom implementation. Signature: ```typescript asyncStorage?: AsyncStorage; ```