Modern Xiaomi, Redmi and POCO smartphones are equipped with high-quality screens and powerful processors, but users often face a lack of built-in storage. Basic versions of devices can offer as little as 64 or 128 GB, which is quickly filled with heavy apps, games and photos in high resolution.
Fortunately, most of the manufacturer’s models support microSD card installation, which allows you to significantly increase the amount of space available. However, unlike older versions of Android, modern shells MIUI and HyperOS have their own features of working with external drives. Simply moving files is no longer enough – you need to fine-tune the system to fully use the potential of the card.
In this article, we will take a look at all the ways to transfer data, from simple media storage to complex internal memory integration with external storage, how to format a map correctly, what risks are involved in transferring system applications, and how to avoid data loss during optimization.
Preparation of memory card and smartphone for work
Before you start taking action, you need to make sure your device is technically ready to work with an external drive. Not all Xiaomi models support the installation of memory cards, so the first step should be to check the specification of your smartphone. Usually the slot is located on the end face of the device and combined with a tray for SIM-map.
It is advisable to use UHS-I or UHS-II class drives from proven manufacturers such as SanDisk, Samsung or Kingston. Cheap cards of unknown brands can work unstable, have low write speeds and quickly fail, which will lead to the loss of important data.
After physically placing the card in the tray and turning on the phone, the system automatically detects the new device. A notification will appear on the screen that a new drive has been detected. If this does not happen, go to Settings → About Phone → Storage and check if the volume of the external card is displayed there.
⚠️ Warning: Before you start any file system operations, be sure to back up important data on a cloud server or computer. The formatting process will completely destroy all information on the memory card.
The next step is to choose the mode of operation of the drive. Android offers two main options: use as a portable storage or as part of internal memory. The first option is suitable for storing photos, videos and music, the second is for installing heavy applications and games.
The most effective way to solve the problem of space shortage is the Adoptable Storage feature, which allows the system to perceive the space. SD-The card is an extension of the built-in storage, and in this case, all the data is encrypted and linked to a particular device, which increases security, but makes the card unreadable on other phones without special reset.
To start the process, go to Settings → Memory (or Storage). Find your memory card in the list and click on it. In the menu that opens, select Format. The system will warn you that all data will be deleted and prompt you to choose the formatting type.
Select the option "Use as internal storage" and then start the disk preparation process, which can take anywhere from a few minutes to half an hour depending on the volume and speed of the card, and do not interrupt this process or remove the card before it is completed.
After successful formatting, the system will offer to transfer existing data (photos, applications) to a new disk. It is recommended to agree with this proposal to immediately free up space in the internal memory. SD-The card will work in conjunction with the main memory, and applications will be installed there automatically.
What if there is no “Inner Memory” item?
Some manufacturers hide this feature in the standard interface, in which case it may not be available without root rights or special use of special features. ADB-commands to activate hidden developer menus, and it's also possible that your memory card is too slow to function as a system partition. Even if you didn’t format the card as internal memory, many apps allow you to manually re-install them, especially for heavy gaming and social media that take up gigabytes of space. However, it is worth remembering that not all programs support such migration. → Annexes → All applications. Find the program you want (like a game or messenger) in the list and click on it. From the app menu, select Memory or Storage». If transfer is possible, the Move button will be activated. When you press the button, the system will start copying the application files to the SD-The speed of the process depends on the size of the application and the speed class of your card, and when completed, the memory bar will indicate that the application uses an external drive. Data Type Can be transferred Recommended method Photo and Video Risks Yes Automatic saving Minimum Games (cache) Partially Settings in-game Medium (bugs) System applications No Root High (glitch) Documents Yes File Manager It is important to understand that after the transfer The app can take a little longer to load, because the read speed of the memory cards is usually lower than that of the built-in flash drive of the smartphone. If you notice the program is unstable, it is better to return it to internal memory. Setup of camera and gallery to save on SD One of the main reasons for memory shortage is media content. High-resolution photos and videos are huge. Fortunately, the standard Camera app on Xiaomi smartphones allows you to immediately save pictures to an external drive, bypassing internal storage. Open the camera app and tap the three bars in the upper right corner to enter the menu. Select Settings. Scroll down to the Save section and activate the Save to the Save to the menu switch. SD-Now all new images and videos will be automatically sent to an external drive. For existing photos, you can use the built-in file manager. Go to Explorer, select Images or Video category, select the desired files, and select Move». Specify as the target folder the corresponding section on SD-Some third-party applications, such as Instagram or Telegram, by default save the received files to internal memory, for which you need to separately look for the settings of the ways to save in the menu of the applications themselves, if this is possible for the developers. ⚠️ Note: When transferring photos and videos, make sure there is enough free space on the map. If the map becomes overflowing at the time of shooting, the camera may stop working or stop recording the video. Using a file manager for manual sorting may not be enough to fine-tune and manage files with standard tools, and in such cases, advanced file managers such as Total Commander, MiXplorer or Solid Explorer come to the rescue. These applications provide access to hidden folders and allow you to perform mass operations with files. With the help of file managers, you can transfer large folders with downloads, browser cache and documents. Find the Download or Documents folder in internal memory, highlight the contents and copy it to a similar directory on the external drive. Once you successfully copy the originals, you can delete them. It is also convenient to create symbolic links through the file manager, although on modern versions of Android without root rights it is difficult to do this. A simpler method is to change the default save path in the application settings if such an option is present in the program interface. 💡Use the Cleanup feature in Xiaomi’s standard Security app before transferring data.This will delete temporary files and free up extra room for maneuver. Regular manual sorting helps keep the file system in order, and it is recommended to check the Downloads folder once a month and transfer installation files from there. APK There are various technical difficulties in operation, and one of the common problems is the error of reading the map or the sudden termination of applications installed on the external drive. This may be due to poor quality of the card itself or damage to the file system «SD-The card is damaged" or "Formatting required," try to extract the card, erase the contacts with a pin and insert again. If the error repeats, the card may have failed and needs to be replaced. Another common problem is the slow operation of the phone after transferring applications, which indicates a low write speed (Random). Read/Write) In this case, the only solution is to buy a faster class card. A1 or A2, application-based. 💡The speed of the memory card directly affects the performance of the smartphone. SD-The cards can lead to interface lags and long game downloads. MIUI Check the memory menu after each major system update to make sure the external card is still running in the right mode (FAQ) Can I transfer WhatsApp to WhatsApp? SD Transfer the WhatsApp app with all the data to Xiaomi SD-card by standard means is not possible. However, you can transfer media files (photos, videos) by changing the way you save in the settings of the messenger itself: Settings → Chats → Backup chats. To transfer the database will require complex manipulation of root rights. What happens if you take out the SD card after transferring applications? Applications moved to the external drive will stop running, and their shortcuts on the desktop may disappear or become inactive. Data within these applications will become inaccesssible until the card is re-installed. The system can give an error: “The application is not installed.” Does SD reduce the battery life of the card, but the card can quickly increase the card from the external card’s energy storage time to the card, but the card from the card’s burning power, and the card can be more quickly from the card’s energy storage time it can be overrated. What is the maximum SD card capacity that Xiaomi supports? Officially, most modern Xiaomi models support cards up to 512 GB or 1 TB. However, in practice, larger cards (up to 2 TB) often work as well if they are formatted in the exFAT file system. The exact information is better specified in the specification of a particular model on the official website. Why did photos disappear from the Gallery after transfer? This can happen if the media scanner of the system does not update the database. Try to restart the phone. Also check if files are hidden in the.nomedia folder. If you moved files through the computer, the official website may be violated folder.