Owners of the popular Xiaomi Redmi 8T smartphone often face a critical shortage of internal storage. The standard 64 or 128 gigabytes are quickly filled with apps, high-resolution photos and messenger cache, turning the device into a slow gadget. Android system by default seeks to store all data in internal memory, ignoring the installed microSD card, which creates an artificial shortage of free space.
Fortunately, the Android operating system allows you to use an external drive not just as a file storage, but as a full extension of the system partition. This process, known as Adoptable Storage, allows you to integrate a memory card into the OS structure, making it an integral part of the device. On Xiaomi smartphones with a MIUI shell, this feature has its own nuances, requiring careful preparation and configuration.
Before you take any drastic action, you need to realize that the procedure requires the complete deletion of all data from the memory card. Formatting the card as internal memory irreversibly erases all files, so critical data must be stored on the computer or in the cloud in advance. Once the process is complete, the card will be encrypted and cannot be read on other devices without re-formatting, which is a security measure to protect user data.
To successfully implement your plan, you will need a high-quality memory card of the UHS-I standard or higher with a speed class of at least 10. Using slow cards will lead to a significant decrease in the overall performance of the smartphone, as the system will begin to read some of the system files from an external medium. Owners of Redmi 8T will appreciate the possibility of installing heavy games and applications that previously simply did not fit into the main partition.
Choosing the right storage device for Redmi 8T
The efficiency of the smartphone after memory expansion depends on the characteristics of the selected card. Internal memory Xiaomi Redmi 8T runs at high speed, and a cheap memory card can become a bottleneck, causing "freeze" interface and long loading of applications. It is recommended to pay attention to the marking of the speed of the Class 10, U3 or V30, which ensures sufficient bandwidth for the operation of the operating system.
Card size also plays an important role: it makes no sense to make the main memory of a smaller storage device than the internal storage of the phone. The optimal choice for the Redmi 8T will be 64, 128 or 256 gigabytes of cards from proven manufacturers such as SanDisk, Samsung or Kingston. Buying unnamed cards from marketplaces often leads to the purchase of a fake with a real volume several times less than the stated.
💡
Check the memory card on your computer with h3testw before formatting to make sure it is real and there are no broken sectors.
Read and write speeds affect how quickly apps ported to the card open. If you plan to store only photos and music on an external medium, the requirements may be lower, but maximum performance is needed to use as system memory. Redmi 8T specs claim support for cards up to 256 GB, but many users successfully use 512 GB, although stability in this case is not guaranteed by the manufacturer.
Preparation of the smartphone and backup
Before you start any manipulation of the file system, you need to make sure that the smartphone is fully charged or connected to a power source. The formatting and encryption process is sensitive to voltage surges, and a sudden disconnection of the device can lead to damage to the software part or loss of data. It is also worth checking for the latest updates to the MIUI system, as new versions of the firmware can be changed algorithms for working with external drives.
The next step is to create a full backup of data. Even though we format an external map, the risk of human error or system failure is always present: Save contacts, messages and app settings to your Google account, or use the built-in Mi Cloud app to synchronize important data. Photos and videos are better transferred temporarily to your computer or uploaded to the cloud.
☑️ Redmi Preparation 8T memory-expansion
Insert a memory card into the slot of the Xiaomi Redmi smartphone 8T, Please note that in some versions the second slot may be occupied by the second. SIM-You have to choose between two SIMs and a memory card. After installation, wait for the notification of the new drive to appear in the notification curtain, which signals the successful recognition of the device by the system.
⚠️ Warning: If there is important data on the memory card that cannot be lost, be sure to copy it to the computer. The process of formatting as internal memory will destroy all information without the possibility of recovery by standard means.
Standard formatting through MIUI settings
The first method of activating the memory expansion function is standard and does not require a connection to the computer. After installing the card, go to the smartphone settings menu, select About phone, and then find the Storage section. The list of available drives should display your memory card, which you need to click on to access additional management options.
In the menu that opens, select Format. The system will alert you that all data will be deleted. In some versions of the MIUI shell, immediately after that, the formatting type will be selected: "Use as portable storage" or "Use as internal storage." Select the second option to start the encryption and integration process of the card.
If the system does not offer a choice and automatically formats the card as portable, this means that the manufacturer has hidden the possibility of using Adoptable Storage in this version of the firmware. In this case, the standard methods to activate the function will not work, and you will need to use more advanced tools such as a computer and debugging over USB. Do not try to circumvent this limitation by installing third-party applications from the Play Market, since without root rights they do not have access to system partitions.
Once formatted, the system will suggest migrating existing data (photos, music, some apps) to a new drive. Accept a port to free up space in the internal partition. Now, when installing new applications, the system will default to offer to save it to the memory card, unless the application developer has banned this feature.
Using ADB to activate a hidden function
In cases where the standard menu does not offer to choose the type of memory, you need to use the tool ADB (Android Debug Bridge). This method requires a computer running Windows, macOS or Linux, as well as the installed driver for the Xiaomi smartphone. First you need to activate the developer mode on the phone: go to About phone and quickly press 7 times on the version of MIUI until the message about activation of the mode appears.
In the Additional Settings menu, turn on Debugging over USB. Connect your smartphone to your computer with a cable and allow debugging on your phone screen. Download the Platform Tools package from the official Android developer site and unpack it. Open the command line in the tool folder and enter the adb device command to make sure the computer sees the device.
adb shell sm list-disksExecuting the command adb shell sm list-disks will show the ID of your memory card (for example, disk:179.64). Remember or copy this ID, as it will be needed for the next command, which will force you to create partitions for internal memory.
adb shell sm partition disk:XXX.XX private 100Instead of disk:XXX.XX, substitute your ID. Private tells the system to format the disk as private storage, and 100 means use 100% of the card size. Once you execute the command, the phone can restart and the memory card will disappear from the list of portable drives, becoming part of the system partition.
What if the ADB can’t see the phone?
Application portability and data management
Once the map is successfully formatted as internal memory, it becomes available for application installation. However, not all programs can be moved completely, as the application developer decides. To manage the placement of data, go to Settings → Applications → All applications, select the desired program and press Memory.
If portability is possible, the Change button will be active and you can select a memory card, otherwise the button will be inactive or absent. System applications and some Google services often block the transfer to external media for reasons of stability and data security.
| Type of data | Can we move it? | Recommendation |
|---|---|---|
| Photographs and videos | Yes (automatically) | Set up the camera to save on SD |
| Games (cache) | Partially. | Use a File Manager |
| Messages from messengers | No (usually) | Regular cleaning of the cache |
| Music and documents | Yes. | Move to the root of SD |
| System files | Automatically. | Not to interfere with work |
For photos and videos, it is recommended to immediately change the camera settings. Open the Camera app, click on three bars in the corner of the screen, select settings and activate Save on SD-This will allow you to immediately free up the internal space by writing heavy media files to an external drive.
Possible problems and ways to solve them
Using a memory card as a system can lead to a number of problems that you should know about in advance, the most common of which is the slowdown in the speed of the interface and applications, especially if the card has a low reading speed of random blocks. If you notice that the phone is starting to work slower, it makes sense to return the card to portable storage mode by formatting it again.
Another problem can be the instability of the system after the MIUI. Major Android updates sometimes reset encryption settings or change the path to files, which leads to errors in the applications whose data is on the map, in which cases helps to reconfigure or temporarily retrieve the card before the release of the patch.
⚠️ Note: When using the card as internal memory, retrieve it without first unmounting in the settings (Settings) → Warehouse → Extract) may cause application failures and loss of unsaved data.
It is also possible that the system will stop seeing the card after a long period of operation, which may indicate overheating or physical wear and tear. Memory cards that are constantly writing and reading (like the system partition) wear out faster than normal file storage.
💡
The quality of the memory card determines the stability of the smartphone: savings on the drive can lead to a constant reboot of the phone and loss of data.