Owners of the Xiaomi Redmi 8T smartphone often face limited internal memory, which is quickly filled with modern heavy apps and games. The standard procedure for transferring programs to a memory card in the MIUI shell is often hidden or completely blocked by the manufacturer, which causes bewilderment among users accustomed to other Android smartphones. Despite the presence of a microSD slot, the system by default does not offer the “Move” button in the application settings, leaving gigabytes of free space on the flash drive unused.
But there's a proven method to get around this limitation without having to root or flash the device. USB team ADB (Android Debug Bridge, which you can force the operating system to consider an external memory card as a full extension of internal storage, requires care, but it is completely safe for warranty and allows you to effectively expand the useful area of the device.
In this article, we will discuss in detail the preparation of a memory card, setting up the environment on the computer and step-by-step algorithm of actions for data transfer. You will learn how to format the media correctly, what commands to type into the console and how to avoid common errors that can lead to data loss or unstable system operation.
Preparation of memory card and smartphone for work
The first and most important step is to properly prepare the external drive, as its quality and write speed depend on the stability of the ported applications. For Redmi 8T, it is recommended to use Class 10 or higher cards, preferably from well-known manufacturers like SanDisk or Samsung. Slow cards can cause friezes in games and long downloads of programs, negating all the benefits of memory expansion.
Insert the memory card into your smartphone slot and wait for notifications about the connection of the new device. The system will suggest using the drive as a portable storage or as internal memory; for our method, you need to choose formatting as a portable storage to maintain the ability to manually manage partitions through ADB. If the card was previously used in other devices, it is better to delete all data from it, creating a clean file system.
⚠️ Note: The formatting process will completely remove all files from the memory card. be sure to back up photos, documents and music to your computer or cloud storage before you start manipulating them.
After you physically install the media, you need to activate the developer mode in your smartphone settings. Without this step, the computer will not be able to interact with the phone's file system at a deep level. Go to Settings → About Phone and quickly click on the MIUI version seven times until you get a message that you have become a developer.
Configure debugging over USB and install drivers
To successfully execute the transfer command, you need to ensure a stable connection between the smartphone and the computer. USB-It's a cable, preferably original, that came with the kit, or a certified analogue that supports data transmission. Cheap charging cables may not transmit control signals, which will lead to connection errors.
Go to Settings → Additional Settings → For developers. Find USB Debugging and activate the switch. When you first connect to a new computer, a request for debugging permission will appear on your smartphone screen — be sure to tick Always Allow and click OK. Also, in this menu, it is recommended to turn on the option “Do not turn off the screen” when charging, so that the process does not stop due to going to sleep mode.
On the computer side, you need to install a minimum set of ADB drivers. Download the Platform Tools package from the official Android developer site. Unpack the archive in the root folder of the disk, for example, in C:\platform-tools, so that the path to executable files is short and does not contain Cyrillic characters that can cause errors in the command line.
☑️ Checking readiness for transfer
Check the connection by opening the command line in the tool folder and entering the adb device command. If a device with a serial number and device status appears on the list, then the connection is established correctly. The unauthorized status indicates that you need to unlock the smartphone screen and confirm permission.
Using ADB commands to change storage
The most important step is to execute commands that will change the configuration of the storage. In the command line window, where the connected device is already displayed, enter the command adb shell. After the shell invitation (character $) you need to start the storage management utility sm (storage manager).
Enter the sm list-disks command to see your memory card ID. The system will give you a disk:179.64 or similar code. Write down this ID because it is unique to your device and is necessary for the next command. A single-digit error will result in the command not being executed.
Now, run the command sm partition disk:XXX,XX private by replacing the disk:XXX,XX with your real identifier. This command will force the file system of the card to be suitable for application installation. Once this command is executed, the phone may restart or require reconnection.
What to do if the team is not executed?
Once the command is successfully executed, the system will automatically redistribute space, and the memory card will now be hybridized to allow application data to be transferred to it. Please note that after this procedure, the card will be encrypted and cannot be read on other devices without formatting.
Transfer of applications and games to external storage
Once the memory card is switched to private mode, the standard MIUI interface may still not show the port button for all applications. However, for many games and programs, this option will become available. Go to Settings → Applications → All applications, select the desired game and find the item “Use memory”.
If the Move button is active, just press it and wait until the process is over. In some cases, the system will suggest moving only a portion of the data, leaving the cache inside, which is normal behavior for Android system constraints, which prohibit the transfer of mission-critical components of the application kernel.
For applications that don’t have a port button even after manipulating ADB, you can use third-party file managers or specialized utilities such as Files2SDcard (require root) or manually moving folders with cache. Often heavy games store data in an Android/obb or Android/data folder that can be moved to the map manually by creating symbolic links, but this requires advanced knowledge.
| Type of data | We can move it. | It's still in my memory. | Recommendation |
|---|---|---|---|
| Cash games (OBB) | Yes (manually) | No. | Move through the file manager |
| APK file of the application | Partially. | Yeah (part) | Use the standard transfer |
| Preservation of games | No. | Yes. | Backup to the cloud |
| Media files | Yes. | No. | Set up the camera app |
Problem Solving and Possible Errors
In the process of expanding memory, Redmi users 8T You may encounter a number of common problems, and one of the common mistakes is reporting damage. SD-This happens if the card was of poor quality or if the process was interrupted, in which case you need to format the card again on the computer in the file system. FAT32 or exFAT and repeat the procedure.
Another problem is the disappearance of widgets or the unstable operation of portable applications, which is due to the fact that the speed of reading an external card is lower than the speed of internal memory. eMMC/UFS. Applications that require fast loading of assets (for example, PUBG Mobile or Genshin Impact, can run slower or fly out.
⚠️ Warning: Do not remove the memory card while the smartphone is on.This can damage the application database and require a complete reinstallation. Always use the Safe Retrieval feature or turn off the phone before retrieving it.
If the game has lost sound or notifications have stopped working, try clearing the cache of a particular application through settings. Sometimes the system takes time to index new paths to files, so after a large-scale data transfer, it is recommended to restart the device.
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Use the memory card only for games and heavy applications, and system programs like instant messengers or banking applications are best left in internal memory for maximum response speed and security.
Return to the factory storage settings
If you decide to sell your phone or return it to the way it was, you have to reverse the change correctly. Just take out the card is not enough - you have to execute the command sm forget. [ID_disk] ADB, where [ID_The disk] is the same identifier that was used to create the partition, which will remove the encryption and allow the card to be used on other devices.
Once you do forget, the phone will suggest formatting the card as a portable storage, and accept that. All the applications that have been transferred to the card will stop running, and they will have to be reinstalled into internal memory.
It is important to understand that the reverse process is not always perfectly smooth. Some residual files may remain in hidden partitions. For complete cleaning, it is recommended to reset the settings of the smartphone itself after returning to the factory settings of the storage, saving important data beforehand.
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Using ADB is a powerful tool that gives you complete control over the file system, but requires accuracy. One error in the syntax of the command can lead to formatting the wrong disk.
Alternative ways to free up space
If messing with the command line seems too complicated or risky, there are simpler, if less effective, ways to free up space on the Redmi 8T. First of all, use the built-in cleaning tool, which is located in the Security app. It can find duplicate files, old screenshots and messenger cache.
Also effective is the use of cloud services: set up automatic upload of photos to Google Photos or Yandex.Disk with the function of freeing up space, which will remove the original photos from the memory of the phone, leaving them available in the cloud.
Remember to clean the Download folder and browser cache regularly. Often users forget about downloaded APK installation files or watched videos that take up gigabytes of space. Regular digital hygiene extends the life of internal memory more effectively than rare application transfers.