Owners of Xiaomi, Redmi and POCO smartphones often face a lack of built-in storage, especially when shooting high-resolution video or installing heavy games. Built-in memory is filled with system files, messenger cache and multimedia, which leads to a slowdown in the device. The solution is the use of an external microSD memory card, which allows you to significantly expand the available volume for personal files.
Modern MIUI and HyperOS shells provide flexible storage management tools, but the process is not always intuitive for beginners. The system can offer different uses for the drive: as a portable storage or as part of internal memory. Proper configuration at the initial stage will help avoid confusion in the future and ensure that your data is safe when you change devices.
In this guide, we will cover all the steps of working with an external drive, from physical installation and formatting to automatic transfer of photos and videos. SD-You can also use a map, transfer files already in place, and even try to install applications to an external slot.
Preparation and installation of a memory card in a smartphone
The first step is to physically install the drive. Most Xiaomi models use a combined tray (SIM + microSD) or a separate slot located at the end of the case. Removing the tray will require a special paper clip coming with the kit, or a thin needle. It is important to insert the card with the correct side, focusing on the gold contacts and the shape of the cutout, so as not to damage the contacts of the reader.
Once the card is installed, Android will automatically detect the new device and issue a notification in the curtain. If there is no notification, check the density of the card or try to reboot the smartphone. Modern microSDXC cards with a capacity of 128, 256 and even 512 GB are usually determined instantly, but for stable operation they need to be formatted in the file system compatible with Android.
The speed of the external drive directly affects the speed of the system when reading data. To record video in 4K or install applications, it is recommended to use U3 or V30 speed cards. Slow C10 cards can cause delays when shooting videos or long loading of the gallery.
⚠️ Warning: Before installing a new card, be sure to copy important data from it to your computer, if there is any. The process of setting up a smartphone often requires full formatting, which will permanently delete all information.
☑️ Pre-installing check
Configuring and formatting the drive
Once the card is discovered, the system will offer two options for using it: Portable Storage or Internal Storage, the first option being standard and the most secure, and in this mode, the card works like a regular flash drive: you can store photos, music and documents on it, and you can easily extract it and connect it to another device, such as a computer or a TV.
The second option, known as Adoptable Storage, combines an external card with the phone's internal memory. The system encrypts the drive, and it becomes an integral part of the smartphone. It will be impossible to retrieve such a card without losing data and resetting the settings, and transferring to another phone will require full formatting. This method is suitable if the internal memory is critically small, but it can reduce the overall speed of the device.
For most users, portable storage mode is the best choice. To activate it, go to the Settings menu. → The phone. → The vault, find yours. SD-The system will warn you to delete the data — confirm the action. The formatting process usually takes a few seconds or minutes depending on the volume.
| Parameter | Portable storage | Internal storage |
|---|---|---|
| Compatibility | It works on any device. | Tieted to one smartphone |
| Security of data | Available on extraction | Encrypted, without maps can not be read |
| Speed of operation | Depends on the class of the card. | Could slow down the system. |
| Recommendation | For photos, videos, music. | Only in acute GB shortages |
What is an exFAT file system?
Automatically save photos and videos on SD-map
The most popular scenario for using external memory is to move the storage location of photos and videos. Xiaomi camera by default saves all pictures in internal memory, but this setting is easy to change, this will allow you to take hundreds of pictures and record long videos without worrying about filling the system partition.
To change the save path, open the Camera app. In the upper right corner, click on the menu icon (three horizontal bars) and select Settings. Scroll down to the Saving or Storage section. Activate the Save on SD-From now on, all new media files will be written directly to an external drive.
It’s worth noting that some shooting modes, such as slow motion or 8K shooting, may still use internal memory due to the high-speed requirements, in which case the system will automatically switch to the built-in drive, even if the card is inserted.
- 📸 Open the Camera app and go to the settings menu.
- 💾 Find the item "Save to" SD-map and turn it on.
- 🎥 Check status: under the viewfinder may appear the icon of the memory card.
- ⚙️ For the DVR (if any), the setting is performed separately in its menu.
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Check the DCIM folder on your memory card periodically, and if you change your phones frequently, that’s where your most valuable footage will be, and it’s easy to transfer it to your new device.
Transfer of existing files and folders
If you’ve just installed a memory card, chances are your internal memory is already packed with old photos, music, and documents. Manually moving thousands of files is inconvenient, so you’d better use Xiaomi’s built-in Explorer tool, which allows you to quickly move large amounts of data between partitions.
Launch the Explorer app (Folder icon). On the home screen, you'll see the Internal Shared Drive sections and yours. SD-Go into the internal memory, find the folders. DCIM (Photos from the camera, Pictures (screenshots, images from social networks), Download and Music. Select the desired folders or files, click More (three dots) and select Move».
Then go to the root. SD-You can use the maps to navigate the conductor and click "Put in." The system will copy the data, and this process can take time depending on the volume. Once completed, you can delete the originals from internal memory if they weren’t moved automatically (Move the function usually deletes the original, as opposed to Copy the original»).
Special attention should be paid to the Android/data folder, where many apps and games cache heavy resources. Manual transfer of this folder can disrupt the application, as the paths to the files can get lost. To transfer the cache of games, it is better to use the built-in functions of the gaming platforms themselves or special utilities if they are supported by your version of Android.
⚠️ Note: Do not delete files from internal memory until you are sure that the process of moving is 100% complete and the files are correctly opened in a new place.
Installation of applications on a memory card
The issue of installing applications SD-The map in modern versions of Android (starting with 6.0 and above) is ambiguous. Google and Xiaomi developers have limited this opportunity to improve system stability and data security.
Some apps allow you to transfer only a portion of your data (cache) through the settings menu. → Annexes → All apps, select the app you want and find Memory. If the Change button is active, you can choose to use it. SD-However, for most system and popular applications (WhatsApp, Telegram, Instagram), this feature is blocked by developers.
There are other ways to do things, such as using ADB-commands to force Adoptable Storage or use special managers, but they require Root rights. Obtaining Root rights deprives of warranty and may make it impossible to work banking applications and services Google Pay (Mi Pay). For the average user, this method is not recommended.
The best strategy is to install only the most necessary applications in internal memory, and all media files, documents and browser cache are sent to an external drive. This frees up precious system space, which really affects the speed of the interface. MIUI/HyperOS.
- 📱 Go to the settings of a specific application through the smartphone menu.
- 🔍 Look for the item "Storage" or "Memory».
- 🔄 If the "Change" button is available, select SD-map.
- ❌ If there is no button, transfer is impossible without Root rights.
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Full installation of modern applications on SD-You can't have a card without a Root card. Focus on cleaning up your internal memory of your media files.
Solutions and optimization of work
Sometimes users run into problems: the card is not readable, files are saved in the wrong place, or the system writes about a reading error. Often the reason lies in a poor contact or file system. If the phone stops seeing the card, try to remove it, wipe the contacts with a dry wipe and paste again.
Another common problem is low recording speed, where if you see a message that says "Too slow to record" when you're shooting a video, the card speed class is not enough for the resolution you chose, in which case you either need to lower the quality of the shooting in the camera settings or change the card to a faster one (class U3, V30, A2).
To extend the life of the memory card, it is recommended not to fill it completely, leave about 10-15% of the free space, this is necessary for the file system and write/rewrite processes to work correctly, and the overflow card may start to work slower or stop writing new files.