Reclaim precious phone memory. Learn how to safely move your encrypted books, audio companions, and archives to an external micro-SD card.
Why Migrate to an SD Card?
A well-curated personal library grows quickly. When your shelves hold multi-volume encyclopedias, high-resolution comic book archives (CBZ), illustrated art monographs, and chapter audio attachments, your collection can consume dozens of gigabytes of phone memory.
Rather than deleting finished books to preserve internal storage space, GemReader allows you to migrate your entire book repository to an external micro-SD card. Your library remains completely accessible, while your phone's internal flash storage stays light and responsive.
What You'll Need
Before beginning migration, verify that you have:
• **Platforms**: An Android device (Android 10+) equipped with an active, formatted micro-SD card. • **Capacity**: Sufficient available free space on the SD card to accommodate your library size. • **Battery**: At least 30% battery life (or your device plugged in) during large multi-gigabyte transfers.
Step-by-Step Instructions
1. Open GemReader, tap the gear icon in the library header (or tap **⋮** -> **Settings**), and scroll down to **Storage**. 2. Tap **Storage Location**. 3. In the storage location dialog, select **External SD Card**. 4. Android's Storage Access Framework will appear. Navigate to your micro-SD card, choose or create a dedicated folder (such as *GemReaderLibrary*), and tap **Use this folder**. 5. Tap **Allow** to grant GemReader permission to write to your memory card. 6. Tap **Move Library**. GemReader will begin moving your book files, systematically verifying the data integrity of each volume before freeing the space on your internal storage. 7. A progress bar will show the migration in real time. Once complete, a confirmation summary will report your newly reclaimed internal device storage.
Helpful Tips & Common Questions (Librarian's Advice)
• **AES-256 Encryption Maintained**: All books moved to your micro-SD card remain fully encrypted at rest. If the card is ever removed or read by an external computer, your private books and notes remain secure. • **Safe Removal Protection**: If your micro-SD card is ever accidentally ejected or unmounted, GemReader displays a gentle warning and pauses library operations to prevent database corruption until the card is reinserted. • **Fast Card Recommendations**: For smooth comic page turns and rapid chapter searches, we recommend high-speed memory cards rated Class 10, U3, or V30.
Try it yourself