Xiaomi smartphone owners often face the need to redistribute disk space when built-in storage begins to be scarce. SD-This is a card as an extension of internal memory, but sometimes this feature needs to be canceled, this may be due to the sale of the device, the transfer of the drive to another gadget or the desire to return the original configuration of the system.
The process of disconnecting the drive from internal storage is not always obvious and hidden in the depths of system menus. Incorrect actions can lead to data loss or unstable operation of the operating system. It is important to understand the difference between simple extraction and software shutdown of the mode.
In this guide, we will discuss all the available ways to return the memory card to removable media, learn about the nuances of the MIUI and Android file system, as well as how to safely prepare the device for changing the memory configuration without risking damage to important files.
⚠️ Warning: Before any manipulation of the drive modes, it is strongly recommended to create a full backup of important data to a cloud service or computer.
Differences between internal and removable storage
Understanding the storage architecture in Android is key to successful memory management. By default, the memory card is portable, allowing you to store photos, videos and music there. However, when you activate the Adoptable Storage feature, the system encrypts the partition and combines it with the main drive.
When the card becomes "internal", it loses compatibility with other devices without prior formatting. The file system changes, and access to the data is blocked for external connections, this is done for security and protection of user information from theft.
Disabling this mode requires completely erasing the partition, because the data structure changes dramatically. You can't just switch the switch in the settings - you need to recreate the sections. Below is a table illustrating the main differences in the modes of operation:
| Parameter | Portable regime | Internal regime |
|---|---|---|
| Encryption | Missing or basic | Full Encryption Linked to Device |
| Compatibility | It works on any device. | Only on a specific smartphone. |
| Use of the | Media files, documents | Installation of applications, system cache |
| Speed of access | Standard. | Priority for the system |
It’s important to note that not all Xiaomi models support full-fledged memory expansion. Budget series often have restrictions on installing apps on external media, even if it’s formatted correctly.
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Use U3 or V30 speed memory cards to operate in internal drive mode to avoid interface brakes.
Preparation for changing memory configuration
Before you start disabling the internal map, you need to do a number of preparatory steps, which minimize the risk of data loss and ensure the stability of the process, the first step should always be to check the battery power - it should be at least 50-60%.
The second important step is to transfer all valuable files, because the process of deactivating involves formatting, all data on the map will be destroyed, use the file manager or connection to the PC to copy the information.
- 📂 Copy all photos and videos to the cloud or to your computer.
- 📱 Check for free space in the phone’s internal storage for temporary file placement.
- 🔌 Make sure the cable is USB The memory card adapter is functional and stable.
- 🔋 Connect the device to the charger during operations.
It is also worth disabling all running applications that can use memory card resources, and background processes can interfere with partition redistribution, which will lead to errors in the file system.
☑️ Preparation for formatting
Standard method of disconnection through settings
The safest and most recommended way to disable an internal card is to use MIUI tools. This method does not require root rights and is safe to guarantee the device.
You need to go to the settings menu first, find the storage section, and it can be called Memory, Storage, or About Phone in different firmware» → «Memory. This is the location information.
Find the control room. SD-If it's used internally, the system will offer the option "Disable" or "Format as portable storage.
⚠️ Warning: During the formatting process, the phone may reboot several times. Do not press buttons or remove the battery until the process is complete.
Once the card is done, it will return to normal removable media, and you can take it out and paste it into another device, but all the data on it will be deleted, which is the normal behavior of Android security.
Use of Root and ADB Team Rights
If the standard menu does not provide disabling options (which happens on some versions of MIUI), you can use more advanced methods. This will require superuser rights or access to debugging by ADB.
The Android Debug Bridge method allows you to send commands directly to the system, USB-cable and drivers installed. You need to activate debugging mode on the phone in the "Developers" menu».
adb shell sm list-disks
adb shell sm partition disk:179,64 publicThe list-disks command will show your drive ID, and the partition command with the public option will return it to removable status. Be extremely careful with the disk number so that you do not erase data on the internal drive of the phone.
For root users, there are specialized applications like Root Explorer or Termux that allow you to manage partitions directly without the limitations of the interface, but the risk of damaging the bootloader or system is much higher.
Risks of using ADB
Solutions to Disconnection Problems
The process of disabling the internal card does not always go smoothly. Xiaomi users may experience a freeze in the formatting process or an error “failed to format” often due to file spreadsheet damage or physical card defects.
If the system says the map is busy, check if the background apps that use media are running, close all programs through the task menu, sometimes it helps to simply restart the device before you try again.
In the case of a cyclic reboot after trying to change the settings, you may need to log in to Recovery mode. Here you can reset the settings or try formatting the card through third-party utilities on the PC using a card reader.
- 🔄 Try restarting your smartphone in safe mode and repeating the procedure.
- 💾 Use a low-level formatting program on your computer if your phone doesn’t cope.
- 🔍 Check the card for errors with the utility CHKDSK or DiskDigger on PC.
- 📉 If the card is old, it may wear out physically and fail when changing the recording mode.
Sometimes the problem lies in the slot itself, and contact oxidation or mechanical damage to the reader can interrupt the writing process necessary to change the partition type.
Optimizing memory after disconnection
Once the memory card has become removable, it is recommended that you optimize it, prolong the life of the drive and ensure a stable write speed, and the file system requires maintenance even after formatting.
Use MIUI's built-in garbage cleaners. Security has a storage optimization feature that removes temporary files and cache that may have been left behind after the change in modes.
It is recommended to check the status of the card regularly. If you notice a decrease in reading speed or periodic hangings when watching videos, it is possible that the card’s resource is coming to an end. SD-Cards have a limited number of rewriting cycles.
⚠️ Warning: Don't fill out the memory card to the point of failure. 10-15% free space for normal operation of the controller and leveling of wear of cells.
To store applications, it is better to use the phone's internal memory, since the speed of access to it is higher, leave the map for media files, documents and archives, this separation will ensure maximum performance of the smartphone.
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Regular backup of data from SD-Cards are the only reliable way to protect information, as flash memory can fail at any time.