☁️ 05. Sync & Backup

Keep data completely in your own hands; effortless migration to a new device.
Category: Data Sync · Estimated Reading Time: 4 minutes
Carefully collected books, daily milestones, and thoughtful reading notes should never be lost when changing devices or resetting iOS. BookFun 2.2 provides private multi-device sync, cloud drive serial updates, and one-tap archive migration. This guide covers how to sync, how to back up, and safe recovery practices.

📑 In This Guide

1. Automatic Seamless Sync Across Apple Devices
2. Connecting Home NAS or Baidu Drive for Auto-Sync
3. Local Data Backup & Restore: Selective Strategies
4. Shareable Backup: Book Export & Version Migration
5. Core Breakdown: What is Included in Each Mode?
6. How to Safely Restore Backups Without Accidental Overwrites

1. Automatic Seamless Sync Across Apple Devices

If you read across iPhone, iPad, or Mac:

• Silent Progress Synchronization: Log in with the same Apple ID on all devices and ensure BookFun is toggled on in iCloud settings. Your chapter and sentence milestones sync automatically—no manual uploads needed;
• Unified Bookshelf & Highlights: Group folders, ratings, highlights, and thoughts roam effortlessly across your devices;
• 100% Private & Secure: All data travels via your private Apple iCloud container, never passing through third-party servers.

2. Connecting Home NAS or Baidu Drive for Auto-Sync

Have a Synology, QNAP, or personal NAS, or use Baidu Drive?

2.1 Easy Network Storage Connection

1. Go to “Profile” -> “System Settings” -> “Cloud & Network Storage”;
   
2. Tap “Add Connection”, supporting SMB Local Network Sharing, WebDAV, or Baidu Drive;
3. Enter local IP or authenticate; credentials are encrypted securely in the iOS Keychain.

2.2 Serial Updates & Directory Tracking

Under “Serial Update Management”, track incoming chapters across your remote drive:

• Smart Sync Window: Set a sync window (e.g. default “Updated within 30 days”); scans intelligently pre-select recently updated books, skipping decades-old archives;
• Clear Status Badges:
  • Displays file size, modification date, and status (e.g. “Pending · Not on Shelf” or “Synced · 10 days ago”);
  • Toggle states easily: orange for “Pending Sync”, gray for “Skip”;
• One-Tap Ingestion: Tap “Refresh”, “Select All”, or sort by “Recently Updated”. Tap “Done” in the top-right to ingest newly appended chapters in bulk.

3. Local Data Backup & Restore: Selective Strategies

Create a complete offline data snapshot via “Profile” -> “System Settings” -> “Backup & Restore” -> “Local Data Backup & Restore”:

• Selective Backup Strategies: Tap the settings gear to toggle specific categories:
  • 📖 eBook Library: All EPUB, PDF, TXT source files;
  • 📄 Reading Data: Bookmarks, highlights, notes, and milestones;
  • 👤 Profile & Preferences: Avatar, nickname, typography settings, and TTS preferences;
  • 🔤 Custom Fonts: User-imported Chinese and custom fonts;
  • 🌐 Cloud & Network Configurations: Saved WebDAV/SMB connection profiles and sync policies.
• Custom Naming & Timestamps: Set device prefix tags (e.g. iphone, ipad) and enable timestamps to generate standardized archives like bookfun_full-v2_0-20261015_2338.zip;
• One-Tap Export & Restore: Tap “Backup Now” to save to the Files app or share via AirDrop. Tap “Restore Now” to restore.

4. Shareable Backup: Book Export & Version Migration

To batch-share books or export before major software updates, use “Shareable Backup (Version Upgrade Export)”:

Designed specifically for two use cases:

1. One-Tap Library Sharing: Export all active eBooks into a single zip archive for friends or desktop archiving;
2. Pre-Upgrade Safeguard: Export prior to major architecture overhauls to ensure book access is never compromised.

5. Core Breakdown: What is Included in Each Mode?

6. How to Safely Restore Backups Without Accidental Overwrites

6.1 Smart Defense & Corruption Tolerance

Restoration performs automatic health checks:

• Corrupted or empty archives are blocked safely;
• If individual files are damaged in a bulk restore, BookFun skips them gracefully without aborting the entire process.

6.2 Preventing Accidental Overwrites

1. On your new or reset device, go to “Profile” -> “System Settings” -> “Data & Backup”;
2. Tap “Restore from Backup” and select the archive file;
3. Choose your restoration mode:
   • Smart Merge (Recommended): Ingests missing books and notes while keeping current device milestones;
   • Full Mirror Overwrite: Resets the app to match the exact snapshot state of the backup;
4. In seconds, your shelf, covers, and notes will be restored!