Modern Xiaomi, Redmi and POCO smartphones often have large built-in storage capacity, but over time, even 128 or 256 gigabytes can be occupied. High-quality photos, 4K videos, heavy games and multimedia files from instant messengers quickly fill the free space, causing the system to slow down. In such situations, the only sure solution is to use an external microSD storage format that allows you to offload the main memory of the device without removing important data.
The process of moving information to an external media in the shell of MIUI (or HyperOS) has its own features that differ from stock Android. The user needs not only to insert the card, but also to format it correctly, and also to reconfigure the save paths for the camera and bootloader. Without previously formatting the card to the exFAT file system or FAT32, the Android system may simply not see the drive or refuse to write files larger than 4 GB to it.
In this article, we will discuss in detail all the stages of working with external memory, from choosing the right memory card to fine-tuning the system paths, you will learn how to transfer already existing photos and documents, and also consider the possibilities of porting the applications themselves, which is especially important for budget models of smartphones with limited built-in storage.
Preparation of memory card and smartphone for work
The first step is always to physically install the drive and check it first. It's important to understand that not all memory cards are equally effective when working with smartphones, especially if you plan to store applications there or shoot high-resolution video. The card slot is usually located on the end of the device and requires the use of a special clip included in the package.
After removing the tray, you need to carefully install the microSD in the appropriate slot, observing the shape of the contacts. You should not make excessive efforts, since the mechanism of the lock is quite fragile. If you use a two-sim tray, make sure that the memory card does not block the contacts. SIM-cards, unless the design provides a separate space for the storage device.
⚠️ Warning: Before removing or installing a memory card, it is strongly recommended to turn off the smartphone completely. Although modern systems support hot connection, the risk of damage to the file table or physical failure of contacts with the current on still remains.
The speed class of your card is critical. For comfortable work in conjunction with an Android smartphone, the minimum requirement is the Class 10 marking, but for recording video in 4K and installing games, it is better to use UHS-I or UHS-II standards labeled U3 or V30. Slow cards can cause interface lags and long downloads of content.
Here are the main characteristics that should be considered when choosing:
- 🚀 Reading speed: should be at least 90-100 MB/s for fast downloading applications and gallery.
- 💾 Memory: modern Xiaomi supports cards up to the size 1 TB, but the best price is 64-256 GB.
- 🛡️ Protection: Having protection from water, shocks and X-rays will prolong the life of your data.
- 🏷️ Brand: Use products from trusted manufacturers such as Samsung, SanDisk or Kingston to avoid data loss.
Formatting and configuring an external drive
Once you have physically installed the card, you will be able to format it to be fully used, and the MIUI shell will suggest that you do this automatically when you first connect, but you should do this manually through the settings to make sure that the file system you choose is correct.
To navigate to the menu, open Settings, then search the About Phone section and click on Warehouse. Your list of available drives should show you your SD-The system will warn you that all data on the media will be deleted, so if there are already files on the map, they must be copied to the computer beforehand.
☑️ Preparation for formatting
In the formatting process, the system will offer two uses: as a portable storage device or as part of internal memory. The first option is standard and the most secure, it allows you to store photos, videos and music, and port certain applications. The second option (Adoptable Storage) makes the card an integral part of the system, encrypts it and makes it unreadable on other devices without re-formatting.
We recommend choosing Portable Storage mode if you plan to move data between devices frequently or use the card in your camera.Internal storage mode only makes sense if the smartphone's built-in drive is critically small (like 16 or 32 GB) and you don't plan to take the card out of your phone.
| Parameter | Portable storage | Internal memory. |
|---|---|---|
| Encryption | No (read on PC) | Yes (only on this phone) |
| Portability of applications | Partial (optional) | Automatic. |
| Speed of operation | Depends on the card. | It requires very high speed. |
| Security of data | Risk of loss when card breaks | High (device binding) |
Transfer of photos and videos in the gallery
The easiest and most efficient way to free up space is to transfer media files. Xiaomi's camera defaults to save pictures to internal memory, but this setting is easy to change. Open the Camera app, click on the three menu bars in the upper right corner, and select Settings.
In the list of parameters, find the Save on SD-From now on, all new photos and videos will be automatically saved to an external drive, but the old files will remain in the internal memory and need to be moved manually.
Where do I look for photo files?
Use the built-in Explorer to migrate the archive. In the Explorer (or Files) app, go to internal memory, find the DCIM folder, then Camera. Select all the files or folders you need by date, press the More (three dots) button, and select Move.
Then go to the root. SD-maps, create a folder there. DCIM (If you don't have one, you can have a Camera folder inside it, and then you can insert it, and this structure allows the gallery to automatically index the images that you've moved.
- 📂 Open the Explorer and go to the internal storage.
- 📷 Find the file. DCIM And highlight the necessary media files.
- ✂️ Select the Move to the Action menu.
- 💾 Go to the SD-map and paste files into the appropriate directory.
Transfer applications and games to the SD card
The issue of installing apps on a memory card in modern versions of Android is not fully resolved. Since Android 6.0, Google has limited the ability to fully migrate programs to external drives for security and stability reasons.
To check whether a particular application can be ported, go to Settings. → Annexes → All applications. Select the program you want from the list and click on Memory. If the Change button is active, you can choose to use the memory button. SD-card.
⚠️ Attention: Not all applications support portability, developers decide whether to host their software on an external medium, system applications and most Google services will not be able to migrate.
If the change button is not available, there are workarounds, but they require the developer mode to be enabled. You need to click on the build number 7 times in the About Phone section, then in the advanced settings, the Developer Menu will appear, where you can find the Force allow apps on external media.
💡
Use the Cleanup feature in the Security app. It will automatically find large files and app cache that can be safely deleted or moved, freeing up space without manual search.
It is worth remembering that applications running from an external drive can load more slowly, especially if the card has a low read speed, and when you extract the card, such programs will stop working before it is re-installed.
Configure the ways of saving in browsers and messengers
Many users forget that browsers and instant messengers often have their own download settings, which are more important than system ones, for example, Telegram, WhatsApp and Viber by default download media into internal memory, creating huge folders with cache.
In Telegram you need to go to Settings → Data and memory → The path to the files. Here you can specify a specific folder to the SD-a card to save all downloaded files. Similar actions should be done in the settings of the Chrome browser or MI Browser: Settings → Downloaded files → shift.
For WhatsApp, the path is a little more complicated, as newer versions of Android have changed folder structure. Files are now often in Android/media/com.whatsapp. In the settings of the messenger itself (Data and Storage → Media Visibility) you can control the display, but for physical transfer it is better to use the built-in Explorer, moving WhatsApp or Media folders to the map and creating symbolic links (three root rights) or simply changing the way to save in the settings of the application itself, if such an option is available in your version.
Regularly checking these settings helps to maintain order. If you are actively using navigators (Yandex.Navigator, Google Maps), be sure to transfer offline maps, which can take several gigabytes.
Possible problems and solutions
During operation, there may be situations when the smartphone stops seeing the card or files on it, most often due to improper extraction. Always use the Safe Retrieval function in the notification curtain or in the storage settings before physically retrieving the card.
If the card appears corrupt, try formatting it again. In extreme cases, when the computer also does not see the drive, you may need to use special recovery utilities, such as the SD Memory Card Formatter from the SD Association, which performs low-level formatting to eliminate file system errors.
Another common problem is the emergence of duplicate files. When transferring data manually, it is easy to get confused in folders. It is recommended to use file managers with the function of searching for duplicates or to carry out transfer one type of files at a time to control the process.
💡
Regular backup of data from SD-Cards to your computer or the cloud are the only way to guarantee the safety of information, since external drives are less reliable than the built-in memory of a smartphone.
Temperature is also important to consider. When you record 4K video, the memory card can get hot. If your smartphone reports overheating or recording errors, take a break or check if the card is too tightly installed without ventilation (in some cases).