An implementation for flutter file storage. For example keychain has a soft limit of 4kb. Using the file system instead we can store much larger content.
import 'package:flutter_key_value_file_storage/flutter_key_value_file_storage.dart';
import 'package:flutter_secure_storage/flutter_secure_storage.dart';
// Create storage
final storage = FlutterKeyValueFileStorage(FlutterSecureStorage());
// Read value
final value = await storage.read<String>(key: key);
// Read all values
Map<String, String> allValues = await storage.readAll();
// Delete value
await storage.delete(key: key);
// Delete all
await storage.deleteAll();
// Write value
await storage.write(key: key, value: value);