Clone Your Reading Brain: How to Migrate Your Entire KOReader Setup to the Bigme B6 Pro Color in Minutes
Switching to a new Android e-reader usually means hours of tedious reconfiguration. With a simple folder swap via Google Drive, you can port your fonts, dictionaries, and sync credentials instantly.
The Bigme B6 Pro Color has quietly become one of the most compelling pocket-sized devices in the e-ink space. Packing a 6-inch Kaleido 3 color display, an octa-core MediaTek Dimensity 1080 processor, 8GB of RAM, and 256GB of storage into a frame that feels like a miniature notebook, it moves with the snappy responsiveness of a modern smartphone. Combined with customizable side keys and Android 14 under the hood, it is an easy pick as a daily driver.
For dedicated digital readers, however, great hardware is only half the equation. The default software on most Android e-readers rarely matches the granular control of KOReader—the open-source reading application revered for its deep customization, custom typography, and cross-device progress syncing.
The only downside to KOReader’s flexibility is setting it up from scratch on a new piece of hardware. Dialing in your exact status bar metrics, margins, custom fonts, dictionaries, and sync servers on a fresh device can take hours. Fortunately, because KOReader stores its entire configuration inside a single directory on Android, you don't have to rebuild your reading environment when upgrading from another device, such as a Bigme HiBreak Pro Color or a B7 Pro Color. You can simply clone it.
Getting the Right Build of KOReader
Because the Bigme B6 Pro Color runs full Android 14 on modern 64-bit architecture, the cleanest way to install KOReader is directly from the developer’s official GitHub repository rather than waiting on third-party app store updates.
Open Chrome on the B6 Pro Color, navigate to the official KOReader GitHub releases page, and scroll down to the asset list for the latest version. You will see several APK variants listed for Android. Because the B6 Pro Color is powered by a modern 64-bit chip, select and download the file labeled koreader-android-arm64.apk.
Once the download finishes, open your file manager—Google Files works particularly well here—and navigate to your Downloads folder. Tap the APK to begin the installation. Because this is the first time sideloading an app from the browser, Android will prompt you to grant install permissions and may flag the file with a standard security warning. Select "Install anyway" and authenticate with your PIN or biometrics.
Crucial rule: Once the installation completes and the KOReader icon appears on your home screen, do not open the app yet.
The Cloud-Based Brain Transplant
Instead of fussing with USB cables, desktop file transfers, or swapping microSD cards, the fastest way to migrate your setup between two Android e-ink devices is through Google Drive.
On your older, already-configured device, open your file manager and locate the main koreader folder in the root of your internal storage. Compress that entire directory into a single .zip archive (for example, koreader-backup.zip) and upload it to your Google Drive. This archive contains everything: your sideloaded library, custom fonts, installed dictionaries, gesture mappings, and even your progress-sync login credentials.
With the backup in the cloud, switch back to your new Bigme B6 Pro Color and follow this sequence:
Download the archive: Open the Google Drive app on the B6 Pro Color, locate your zipped KOReader folder, tap the three-dot menu, and hit Download. Depending on the size of your book library, this may take a minute or two.
Stage the file: Open Google Files and head to the Downloads directory. Select your newly downloaded .zip file, tap the three-dot menu, and move it directly to the root of your Internal Storage.
Clear any default folders: Navigate into your Internal Storage. If an empty or default koreader folder was generated during installation, select it and delete it completely so there are no file conflicts.
Extract and position: Tap your .zip archive in Internal Storage and select Extract. Once extraction finishes, delete the leftover .zip file. Check the extracted folder structure—if the extraction created a wrapper folder (such as koreader-backup/koreader), go inside, select the core koreader folder itself, and move it directly to the root of your Internal Storage, then delete the empty wrapper folder.
Fine-Tuning for the 6-Inch Canvas
Now it is time to tap the KOReader icon on your home screen. Instead of greeting you with a blank onboarding screen, the app will boot directly into your familiar home folder with your entire library intact. Your custom fonts (like Bitter), dictionaries, status bar layout, and sync credentials will already be active—meaning you can open a book, tap sync, and pick up on the exact page where you left off on your smartphone or tablet.
Because you are likely moving between devices with slightly different screen dimensions or pixel densities, you may need to make one or two minor visual adjustments. A font size configured for a high-density smartphone screen or a larger 7-inch display might look overly large on the B6 Pro Color's 6-inch 300 PPI panel. Simply open a book, dial the font size down to a comfortable level (around 34pt works well for many custom serif fonts on this screen), and long-press to set it as the new default. You may also want to nudge your bottom progress bar margins to match the B6 Pro's bezel proportions.
In less than ten minutes, you have bypassed hours of tedious menu-diving—turning a brand-new color e-reader into a seamless extension of your personal reading workflow.
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