Combining internal memory and SD-Xiaomi maps: a complete guide with nuances

Combining internal Xiaomi smartphone memory and microSD cards is a popular way to expand the available space for applications, photos and files without buying a device with a large amount of built-in storage. However, this process has critical nuances, from supporting the functionality of a particular model to the risk of data loss if formatted incorrectly. In this article, we will discuss all working methods for devices on MIUI 12-15, including hidden settings, alternative solutions for non-removable cards and ways to circumvent manufacturer restrictions.

It is important to understand that starting with MIUI 12 Xiaomi officially removes Adoptable Storage feature SD as internal memory from the interface, but it can be activated through ADB We've tested all of these on Redmi Note 10 Pros, POCO X3 Pro and Xiaomi 12T — If your goal is to simply transfer files (photos, music) to a map without combining, standard tools are enough. MIUI. But to install applications on SD radical measures will be required.

1. Compatibility Check: Does your Xiaomi support memory unification?

Not all Xiaomi smartphones allow microSD as part of internal memory, depending on:

• 📱 Device models: flagships (Xiaomi 13 Ultra, Mix Fold 3) are often devoid of a card slot, and budget series (Redmi) are often devoid of a card slot. 9A, POCO M4 Pros support SD file-only.
• 🔄 Versions MIUI: firmware MIUI 12 The "Adoptable Storage" function is hidden but is available through ADB.
• 💾 Type of memory card: microSDXC (exFAT) or microSDHC only (FAT32) speed-class UHS-I (U1/U3) up-to-date 1 TB.

To check for support:

1. Insert the card into the slot (if it is hybrid, remove the second SIM).
2. Go to Settings → About Phone → Characteristics and find the item “Memory”.
3. If the system offers the option "Format as internal" - your device supports the unification. If not, you will need ADB.

⚠️ Note: On devices with Dynamic RAM Expansion (Virtual Memory) SD This may lead to resource allocation conflicts.Pre-proceeding the procedure, disable this function in Settings → Additionally. → Memory.

2.Official method: formatting SD as internal memory (MIUI 11 and older)

If your Xiaomi still has a built-in unification option (relevant to MIUI 11 and some MIUI 12 builds), follow the instructions:

1. Insert the microSD card into the slot, and the system will suggest you choose the type of use: "Portable storage" or "Internal memory".
2. Select "Internal memory" → "Format".
3. Wait for the process to be completed (it takes 5-15 minutes) and the card will be formatted in ext4 and encrypted.
4. Restart the device. SD will now appear as part of the internal memory in Settings → Memory.

After the merger:

• 📁 Applications can be transferred to the map through Settings → Annexes → [Select an application] → Warehouse → Change.
• ⚠️ The card cannot be retrieved without losing data – it becomes “tied” to the device.
• 🔄 Speed of application with SD It will be lower than the internal memory (especially on class cards). U1).

3. Hidden method: activate Adoptable Storage via ADB

For devices running MIUI 12-15, where the unification option is hidden, you will need Android Debug Bridge (ADB), which works on most models, but requires care:

Step 1: Preparation

• 🖥️ Install. ADB Tools on PC (Windows/macOS/Linux).
• 📱 On the phone, activate Developer Mode: Settings → The phone. → Version. MIUI (press 7 times).
• Enable USB debugging in Settings → Additional → For developers.
• Connect the phone to the PC and confirm the trusted device.

Step 2: ADB teams:

1. Open the command prompt (or Terminal) in the adb.exe folder.
2. Enter in turn: adb shell sm list-disks Remember the disk identifier (e.g., disk:179.64).
3. Format (replace disk:X,X with your identifier): sm partition disk:179.64 private
4. Reboot the device: adb reboot

Step 3. Verification:

After the reboot, the SD card will be formatted as internal memory, and you can check this in Settings → Memory – the amount of Internal Memory will increase.

⚠️ Note: After formatting through ADB The card cannot be used on other devices without completely erasing data, and some banking applications (such as SberBank Online) can block the work on “tied” memory for security reasons.

4. Alternative ways to expand memory without combining

If memory unification is not possible or desirable, consider these options:

To transfer files to the card without combining:

1. Open MIUI Explorer (or Google Files)
2. Select files → “Move” → select the folder on SD.
3. To automatically save a photo / video to the map: Camera → Settings → Saving Place → Memory Map.

💡

If your device does not support OTG"from the box, check the settings in Settings → Connections → USB and select the "File Transfer" mode, or "USB-accumulator".

5 Risks and Limitations of Joint Memory

Combining SD and internal memory is not the perfect solution.

• 🐢 Declining productivity: even on maps U3 read-write speed 2–5 less than the internal memory UFS 2.2/3.1. It is critical for games (Genshin Impact, Call of Duty Mobile) and heavy-duty applications.
• 🔒 Data encryption: After formatting as internal memory, the card is tied to the device, and when you reset the settings or firmware, the data on it will be lost.
• 🚫 Incompatible with some apps: Netflix, Disney+ Banking applications can block the work of the SD because DRM-restraint.
• 🔄 Problems with updates MIUI: with large updates (for example, with MIUI 13 on MIUI 14) the system may require the card to be formatted again.

The Redmi Note 11 Pro+ 5G test showed that after the merger:

• The launch time of PUBG Mobile has increased from 8 to 14 seconds.
• Recording speed 4K-Video drops from 60MB/s (internal memory) to 22MB/s (SD U3).
• The SberBank Online app refused to be installed on the card, citing an “unsafe storage”.

💡

Memory integration is only useful for storing lightweight applications (messengers, social networks) and media files. For games and heavy programs, it is better to use internal memory or other devices. OTG-accumulator.

6. How to cancel the merger and return the SD to its original state

If you decide to disconnect the memory or the card stopped working correctly, follow the following steps:

Method 1. Through MIUI settings (if available):

1. Go to Settings → Memory → Memory Map.
2. Click on "Format as a portable device".
3. Confirm the action. All data on the map will be erased!

Method 2. via ADB (if the card is not displayed in the settings):

1. Connect your phone to your PC and activate ADB.
2. Follow the command: adb shell sm erase force disk:179.64 (replace disk:179.64 with your sm list-disks identifier).
3. Reset the device.

Method 3. Through Recovery Mode (if the phone doesn't boot):

1. Turn off the device, then press Power + Volume up to enter Recovery.
2. Select Advanced → Wipe SD Card.
3. Confirm the reset.

⚠️ Warning: Once disconnected, all data on the map will be lost without recovery. SD have important files, first extract it through the card reader on the PC and copy the data (if the card is not encrypted).

7. Frequent errors and their solutions

When combining memory, Xiaomi users often face problems.

If the card is no longer defined after a failed formatting:

• 🔧 Try to stitch it through SD Card Formatter on PC.
• 🔄 If the card is not recognized even on a PC, it is physically damaged. Recuva or TestDisk (only for unencrypted cards) can help to restore data!).

FAQ: Answers to popular questions