The internal memory of modern smartphones fills up at an alarming rate, especially if you are actively shooting high-resolution video or installing heavy games. Many users of Xiaomi and Redmi devices face a critical lack of free space when the system starts blocking the installation of updates or refuses to start the camera. SD-Card that allows you to expand the available storage without losing personal data.
The process of transferring information may seem complicated only at first glance, but the MIUI or HyperOS shell interface provides enough tools to manage files. It is important to understand that there are several ways to optimize: from simple manual transfer of photos to full transfer of system partitions for installing applications. In this article, we will discuss each method in detail so that you can choose the most suitable for your smartphone model and operating system version.
Before you start taking action, you need to make sure your memory card is working and correctly inserted into the slot.Errors at this stage can lead to data loss or malfunctioning of the device, so follow the steps described below carefully.We will look not only at standard procedures, but also at hidden features that are often ignored by users.
Preparation for portability and map formatting
Xiaomi smartphones support microSD cards, however, for stable operation, it is recommended to use cards of Class 10 or higher speed, especially if you plan to record 4K video on them. After physically installing the SIM card and microSD in the tray, the system will automatically prompt you to format the media.
Formatting is the process of creating a file system that deletes all old data and prepares the map for Android. If you insert a new card, just select the option “Clean and format.” If the card already has important files, you must pre-copy them to the computer, because in the process of formatting all information will be irrevocably deleted.
⚠️ Warning: Before formatting, make sure that the battery charge of the smartphone is at least 30-40%. Interrupting the formatting process due to battery discharge can damage the card file system and it will no longer be determined by the device.
There are two main formatting options that the system offers: as a portable storage and as internal memory. One option allows you to use the card to store media files and transfer them to other devices. The other option encrypts the card, making it available only for that particular smartphone, but allows you to install applications on it.
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Use memory cards up to 256 GB for maximum compatibility. Larger ones (512 GB and 1 TB) can run unstable on older Redmi and Xiaomi models.
To select the formatting type, go to the settings menu. The path usually looks like this: Settings → Warehouse → SD-Here you'll see the current status of the drive and the actions available. If the system doesn't offer you to choose the type right away, you can change it later in the storage properties, but that will require re-formatting.
Transfer of photos, videos and documents
The most common external memory scenario is media storage, where the gallery and the files that take up gigabytes of space are easily moved by standard system tools without the need to install third-party software, and a powerful file manager is built into the system, which is simply called Explorer in MIUI.
To move files, open the Explorer app and go to Internal Shared Drive, where you have application data folders and system directories, find the DCIM folder that stores your snapshots and videos by default, and the Pictures folder for screenshots and images from instant messengers.
☑️ Algorithm of file transfer
Select the files you need with a long press, you can select multiple folders at once, or you can use the "Select All" function if you want to clear the internal memory completely. After highlighting, click the menu button (usually three dots or the "More" button at the bottom of the screen) and select the "Move" option.
The system will suggest you to choose your destination. SD-You can create a new folder to structure the data, for example, by calling it Archive 2026, or you can move the files to the root of the external memory, and then you start copying, the speed of which depends on the speed class of your card.
| Type of data | Standard folder. | Recommended action |
|---|---|---|
| Photos and videos | DCIM / Camera | Move it completely |
| Screenshots | Pictures / Screenshots | Move it completely |
| Downloads. | Download | Move selectively |
| WhatsApp Media | Android / media / com.whatsapp | It requires caution. |
Please note that moving system folders or active application folders can disrupt their operation. Always check if a file is being used by any program in the background. Once the transfer is complete, it is recommended to check the openability of files through the gallery or video player.
Using the card as internal memory
Adoptable Storage allows Android to read SD-This is a key advantage for low-end models with small internal storage (16-32 When this function is activated, the system encrypts the card and combines its space with the main memory.
To activate this mode, go to Settings → The vault, choose yours. SD-Click on the three dots in the upper right corner, then select Storage Settings, where the option "Internal Memory" (or "Use as internal storage") will be available.
Why can’t the card work as an internal memory?
Once confirmed, the system will format the map and start transferring data, which can take a considerable time, especially if the phone already has a lot of information, and during the process, do not remove the card or restart the phone.
It is important to understand the limitations: a card formatted as internal memory will not be read on other devices (cameras, computers) without re-formatting. In addition, when you reset your phone to factory settings, the data on such a card will also be deleted unless you perform the detachment procedure in advance.
Transfer of applications and cache to SD-map
The issue of installing applications on external memory remains one of the most popular, with modern versions of Android and the MIUI shell limited in terms of security and stability of the system, not all applications support transfer, and system applications are impossible to migrate in principle.
To check if you can port a particular application, go to Settings → Applications → All Apps. Select the desired program from the list (for example, a heavy game or a navigator). If the developer has allowed portability, the Move button or Change button will be active in the application menu with the choice of storage.
If the transfer button is missing or inactive, the application is rigidly tied to internal memory, in which case you can try to transfer only the application cache, if such an option is available, or use third-party utilities that require root rights, but this can disrupt the system and deprive you of warranties.
⚠️ Note: Ported applications may run slower if the write speed SD-This can lead to friezes in games or a long load of the program interface. A1 or A2 installing applications.
An alternative solution is to use the “Move to” function. SD-map" in the storage settings for some system data, such as music or documents, which indirectly frees up space for applications to run.
Setup of the camera to shoot on a memory card
To avoid wasting time on the regular transfer of photos, you can set up a regular Xiaomi camera to save pictures immediately to an external map, this is especially true when shooting high-resolution video, which takes hundreds of megabytes per minute.
Open the Camera app and click on the three menu bars in the top right corner. Select Settings. Scroll down to the Saving or Storage section. Here you will see the Save to Save to the Settings. SD-Card" (or "Preferred Storage"). Activate it.
Once this optimisation is enabled, all new images and videos will automatically be recorded to an external storage facility, while the old files will remain in internal memory until you manually move them, as described in the section above, making room for new shoots instantly.
It’s worth noting that some camera modes, such as slow motion or 8K shooting on flagship models, may ignore this setting and only store data in internal memory due to the high buffer write speed requirements.
Possible problems and solutions
Users may encounter various errors during operation. One of the most common is a message «SD-The card is corrupted" or "I couldn't read the contents" often due to improper card extraction or file system failure.
To diagnose, go to the storage settings and try to perform error checks. The system will suggest formatting the card. If the data is important, first connect the phone to your computer in file transfer mode (MTP) and try to copy the information. If the computer does not see the card, use the card reader.
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If the memory card is constantly “flying” or requires formatting, it may be physically worn out or incompatible with your smartphone’s memory controller.
Another problem is the slow operation of the interface after the application transfer, which is solved by replacing the card with a faster model, and it is also worth checking the Settings → About Phone → MIUI version, since new patches often fix errors with external drives.
If the phone doesn't see the map at all, try gently wipe the contacts on the map with a soft wipe or an alcohol wipe. Contact oxidation is a common cause of connection loss, especially if the phone was used in a wet environment.