Modern Xiaomi and Redmi smartphones offer great cameras and powerful processors, but internal memory is often catastrophically lacking, especially in basic models, where 64 or 128 gigabytes are quickly filled with system files, instant messengers and heavy games. When space shortage notifications start to appear daily, the only way out is to use an external drive.
Moving information to a microSD card is not just freeing up space, it's also a way to keep your data safe in case of a system failure. However, the MIUI shell has its own nuances of working with the file system that need to be considered. Unlike pure Android, the process here may look a little different, and some application portability features may be hidden or missing.
Before we start to act, it's important to get the device ready, and if you don't set the format correctly or rush to retrieve the drive, you can lose data, and we'll look at everything from the initial map preparation to fine-tuning the save paths for the camera and messengers.
Preparation of memory card and telephone
The first step is to physically install the drive. Most Xiaomi models have a tray that is combined, so you have to choose between the second. SIM-Use a special paper clip from the kit to carefully remove the tray. It is important to insert the card with golden contacts down, strictly observing the shape so as not to damage the contacts.
Once installed, the device will automatically prompt you to format the drive. Formatting completely clears the card by deleting all old data, so be sure to back up your files on your computer before you start. The system will suggest you choose the type of use: as a portable storage or as part of internal memory. For photo and document transfer, you should choose the first option, since it ensures compatibility with other devices.
What is the difference between file system formats?
The formatting process can take a few minutes. At this time, do not remove the card or restart the phone. If the system reports an error or inability to read the drive, try repeating the procedure through the computer using standard formatting to the exFAT or NTFS file system.
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Use UHS-I (U1) or higher memory cards. Slow cards (Class 4, Class 6) can cause delays when shooting 4K video or long gallery loads.
Transfer of photos and videos through the Explorer
The easiest and most reliable way to free up space is to manually move media content, and for that, MIUI has a standard file manager preinstalled, open the Explorer app or Files on the home screen, and you need to find the folders that occupy the most space.
Usually, photos from the camera are stored in the DCIM/Camera directory, and screenshots are stored in the Pictures/Screenshots folder. Select the desired files with a long press. For convenience, you can click the "Select All" button at the bottom of the screen if you plan to move the entire archive. Then select the "Move" or "Copy" option.
- 📸 DCIM — The main folder where all the pictures and videos taken on the phone camera are stored.
- 📥 Download – here often get downloaded files from the browser and documents from messengers.
- 💬 Tencent/MicroMsg — WeChat folder that can grow to tens of gigabytes.
- 📱 Android/data — It stores cache and game data, and it is not recommended to manually transfer them.
After selecting the files, the system will suggest specifying the destination path. SD-You can create a new folder like Archive Photo 2026 to keep your files from mixing with your system files. Click Insert and wait until the process is over. The speed of copying depends on the speed class of your card and the amount of data you transmit.
☑️ File transfer plan
Setup to save camera data by default
To avoid manually transferring files every time, you can set up automatic saving of new images directly to the external drive, which is especially true for high-resolution mobile photography enthusiasts. Open the Camera app and click on the menu icon (three bars) in the upper right corner.
In the list that opens, select Settings. Scroll down to the Saving or Memory section. Here's the Save to SD-Activate it. All new photos and videos will be automatically recorded to an external drive, bypassing internal memory.
⚠️ Warning: If you remove the memory card or it fails, the camera will automatically switch to internal memory, but you may not notice it right away.
It’s worth noting that some shooting modes, such as 8K Video, Slow Motion or Artificial Intelligence modes, may ignore this setting and only store data in internal storage due to recording speed requirements, which is usually warned by a pop-up notification at the time of shooting.
Transfer applications and games to the SD card
The issue of portability of installed applications (APK) on the external drive in modern versions of Android and shell MIUI The function available in older versions of the system is now often hidden or absent for most programs. SD-maps below, which can cause lags.
However, it is worth checking the portability. Go to Settings → Annexes → All applications. Select the program you want (for example, a heavy game or a navigator). If the feature is available, there will be a button Memory or Storage, and inside it there will be a button Change or Move to SD-map.
| Type of application | Possibility of transfer | Impact on speed | Recommendation |
|---|---|---|---|
| System services | Impossible. | Critically. | Don't touch it. |
| Social media | Partially. | Noticeably. | Better leave it inside. |
| Offline maps | Maybe. | Minimum. | Recommended |
| Hard games | Depends on the game. | Average. | Only if there's not enough space |
If the transfer button is missing (gray or inactive), then the application developer has banned this operation, in which case forced transfer is possible only through debugging mode. USB use ADB-teams, but this requires skills and can lead to unstable program performance.
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Only transfer applications that are rarely used or store large amounts of static data (maps, books) to the map, but not programs that require high response speed.
Working with messengers: Telegram and WhatsApp
Messengers are the main memory eaters, they store thousands of photos, videos and voice messages, and thankfully, Telegram and WhatsApp have built-in tools to change the way media is saved.
In Telegram go to Settings → Data and memory → You can select "Another folder" and specify the directory on yours. SD-After that, all the files that you download will go there, and it's also useful to set up an automatic cache cleanup in the same menu, setting a limit of, say, 1 GB.
For WhatsApp, the situation is more complicated, since in recent versions the application uses a secure Android/media folder, access to which is limited. However, you can use the “Backup” function in the chat settings by choosing to save copies to Google Drive, and local databases periodically manually transfer through Explorer from the WhatsApp/Databases folder.
⚠️ Note: When transferring messenger folders manually, make sure that the folder structure is saved. If you just throw files into the root of the map, the messenger may “not see” them and assume that the memory is empty.
Possible problems and ways to solve them
Despite the simplicity of the procedure, users can encounter errors "SD-The first error is usually solved by re-formatting directly on the phone, the second one occurs if you try to write a file that weighs more than 4 GB to a file system card. FAT32.
Another common problem is the sudden disappearance of files or their corruption, which can be a sign that the memory card has run out of resources or is a fake, cheap cards often have a declared volume of 128 GB, and the real one – 8 GB, which leads to cyclical overwriting of data.
- 🛑 Formatting error: Try formatting the card on PC through the utility SD Card Formatter.
- 🐌 Low speed: Make sure the card supports the standard UHS-I. Older Class 10 cards can slow down the system.
- 🔒 Write Protection: Check if the physical Lock switch on the card adapter is shifted (if used).
If the phone stops seeing the card after rebooting, the contacts in the slot may have oxidized. Carefully wipe the gold contacts of the card with a soft eraser or an alcohol wipe. It is also worth checking whether the tray is sitting tight in the device body.