How to combine Xiaomi phone memory and SD-map: full guide

Combining Xiaomi’s internal memory and microSD card is an effective way to expand the available space for apps, photos and files. However, not all users know that since MIUI 12.5, the combination algorithm has changed, and standard methods from old instructions may not work. In this article, we will discuss current ways for modern models (Redmi Note 12 Pro, POCO X5, Xiaomi 13T, etc.), including hidden developer settings and circumventing system constraints.

It's important to understand that memory consolidation is not just about copying files, it's about creating a single logical volume, where the memory card becomes part of the internal storage, and it allows you to install applications directly on the SD, but it also has the downside: once you combine, you can't retrieve the card without losing data. We'll look at all the nuances, including choosing the right memory card, preparing the phone, and step-by-step steps for different versions of MIUI.

Why Xiaomi is limiting memory integration?

Xiaomi’s MIUI-based smartphones (especially 12-14 versions) often hide the option of combining memory in standard settings, due to several factors:

• 🔹 Performance: Cheap microSD cards (class) A1 or below) significantly slow down the application, which spoils the user experience.
• 🔹 Data security: When combined, the card is encrypted and its loss or damage can lead to irrecoverable loss of information.
• 🔹 Google policy: Starting with Android 9, Google recommends manufacturers to abandon the Adoptable Storage feature due to the risks of unstable work.

However, memory can still be combined, either through hidden menus or through the use of a single memory. ADB-Next, we'll go through both methods, but first you need to get the memory card right.

Requirements for a microSD card to combine

Not every memory card is suitable for combining with internal storage, but here are the key criteria:

Important: Class A1 cards are theoretically supported, but in practice lead to lags in applications. If your card is slower than A2, it is better to use it only for storing media files, not for combining.

⚠️ Warning: Once combined, the card cannot be retrieved without completely resetting the phone, and all data on it will be encrypted and unavailable on other devices.

Method 1: Combining via MIUI settings (for older versions)

If you have Xiaomi on MIUI 10–11 (like the Redmi Note 8 Pro or Mi 9T), the unification option can be available in the standard menu:

1. Insert the memory card into the slot (preferably use Slot 2 if it supports microSD).
2. Go to Settings → Memory → Memory Map.
3. Click Format as internal memory (if option is missing, see Method 2).
4. Confirm the action and wait for the process to be completed (may take 5-15 minutes).

After the merger:

• 📱 The map will be displayed as part of the internal memory in the Warehouse menu.
• 🔄 Applications can be transferred to it through Settings → Annexes → [Select an application] → Warehouse → Change.
• ⚠️ Do not remove the card - this will lead to errors in the system.

Insert the card into the slot | Make a backup of the data from the card | Charge the phone at least 50% | Check the card speed class (A2 recommended)

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Method 2: ADB Connection (for MIUI 12–14)

The newer versions of MIUI have a hidden unification option, but it can be activated via Android Debug Bridge (ADB), a method that works on most models, including the POCO F5, Xiaomi 12 Lite and Redmi Note 11 Pro+.

Step 1. Enable debugging over USB:

1. Go to Settings → About Phone and 7 times click on the MIUI version to activate the Developer Mode.
2. Back to Settings → Additionally. → For developers.
3. Activate Debugging via USB and confirm the resolution.

Step 2. Connect your phone to your PC and execute the commands:

1. Download ADB Tools and unpack the archive.
2. Open the command line (Win + R → cmd) and go to the folder with adb:
3. Connect your phone via USB (select File Transfer Mode) and type:
4. In the answer, you'll see a card ID, like disk:179.64. Copy it.
5. Run the unify command (replace the disk:XXX,XX with your identifier):

Once the command is executed, the phone will automatically restart and the card will become part of the internal memory. You can check the result in Settings → Memory.

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If the sm partition doesn't work, try an alternative method: sm set-force-adoptable true in front of the main command. MIUI on some models.

Method 3: Manual formatting via TWRP (for advanced users)

If standard methods don’t work, you can combine memory through custom recovery TWRP. This method is suitable for hardwired devices and requires an unlocked bootloader.

Warning: Mistakes in TWRP can lead to data loss or phone blinking, and use this method only if you are confident in your actions.

1. Install TWRP for your model (instructions are available on the official website).
2. Boot into recovery: Turn off the phone, then press Power + Volume up.
3. Go to Wipe. → Advanced Wipe.
4. Choose yours. SD-map (usually marked as External) SD).
5. Press Repair or Change File System → F2FS (or ext4 if F2FS is not supported).
6. After formatting, reboot to the system.

This is more flexible, but requires technical skills, and if the card doesn't recognize after formatting, try formatting it back to exFAT via a PC.

⚠️ Note: On some models (Xiaomi) 11T Pro, POCO X4 GT) after-unification TWRP You can get reading errors. In this case, go back to the method of ADB.

How to transfer applications to a unified map?

Once you've successfully combined memory, you need to move the applications correctly so that they work in a stable way.

1. Open Settings → Applications → Application Management.
2. Select the app you want to migrate (like WhatsApp or Google Maps).
3. Click Warehouse → Change → Memory Map.
4. Confirm the transfer and wait until it is completed (may take a few minutes).

Limitations:

• 🚫 Not all applications support portability (e.g., system or high performance requirements).
• 🔄 After updating the application, it can automatically return to internal memory.
• ⚡ Annexes to SD-The card is slower, especially if the class card is slower. A1.

Frequent problems and their solutions

When combining memory, users often encounter errors, and here are the most common ways to fix them:

If the phone starts to overheat or run out quickly after the phone is combined, the memory card is likely to malfunction, and you can check it using the H2testw (Windows) utility or A1 SD Bench (Android).

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Before combining memory, always back up the data from the card and phone, and in case of failure, it will be impossible to recover information.

FAQ: Answers to popular questions