Expo HAS CHANGED

Read the exact versioned docs at https://docs.expo.dev/versions/v57.0.0/ before writing any code.

Local storage

Persistence is SQLite-backed via services/db/ (expo-sqlite, database dot.db).

services/db/client.ts — connection lifecycle: getDatabase(), closeDatabase(), withTransaction().
services/db/migrations.ts — versioned, chained migrations via PRAGMA user_version (list of { version, up }).
services/db/schema.ts — DATABASE_NAME, DATABASE_VERSION, column-list constants.
services/db/repositories/ — one module per table (folders, files, user_preferences).
services/localStorage.ts is a thin re-export (services/db) kept for legacy imports.
Tables: folders, files, user_preferences; files.folder_uri has index idx_files_folder_uri.
Folder and file per-row sync status: local | cloud | local-cloud.
Query usage: getFiles(folderUri?), getFolders(), getFolderFolders(parentUri), saveFolder, saveFile, saveUserPreferences, getUserPreferences, removeFolder, removeFile.
Heavy processing stays server-side; SQLite only persists local metadata/state.