Owners of Xiaomi, Redmi and POCO smartphones often face a shortage of space. The MIUI or HyperOS operating system takes up a significant amount of space, and modern high-resolution apps and photos quickly fill the remaining gigabytes. When space shortage notifications appear daily, the device starts to run slower and installing new programs becomes impossible.
Fortunately, most mid- and low-end models feature a microSD card slot, which allows you to physically expand the available storage space for media and documents, but in order for the system to perceive the external card as a full part of the storage, you need to properly perform the configuration and formatting procedure.
In this guide, we will take a look at all the nuances of memory expansion, how to choose the right drive, how to format it as internal storage, and the limitations of a modern Android shell. Proper file organization will help you forget about memory overflow problems for many years to come.
Choosing the right memory card for a smartphone
Before any manipulations, it is critical to purchase a quality drive. Cheap cards of unknown brands often have real capacity, which leads to data loss and system failures. Read and write speed also plays a key role: if the card is too slow, the smartphone interface can start to slow down.
Note the speed class marking. For modern smartphones, the minimum standard is Class 10 or UHS-I. These markings ensure that the device can work with files without delay. U3 or V30 cards are preferred if you plan to store applications there or shoot videos in 4K.
The card size also matters. Officially, Xiaomi devices support cards up to 256GB or 512GB, but in practice, many models work successfully with terabyte drives. When buying, make sure that the card file system is compatible with your device, although smartphone formatting will solve most compatibility problems.
- 🚀 Choose cards with markings A1 or A2 launcher.
- 💾 The optimal volume for multimedia is from 64 to 128 GB.
- 🛡️ Buy products only from official distributors of the brands SanDisk, Samsung or Kingston.
⚠️ Warning: Avoid buying memory cards in markets or in questionable online stores.Fake drives can suddenly fail, destroying your personal photos and documents without the ability to recover.
Preparation of the device for installation of the storage device
The installation process begins with the physical removal of the tray for SIM-Depending on the Xiaomi model, the tray may be on the top or bottom of the case. Use a special clip included in the kit or a thin needle to extract it. Be careful not to put excessive effort into the process.
After removing the tray, carefully examine its design. Most modern models use a combined slot, where the memory card is installed either in the second socket or on top of the second socket. SIM-Incorrect installation may cause the device to fail to see the drive or one of the SIM cards to stop working.
Before installing a new drive, it is strongly recommended to back up important data if there is already something on the card.The setup process we will describe later will require full formatting, which means removing all information.Make sure the smartphone battery is at least 30-40% so that the device does not turn off at a critical moment.
☑️ Preparation for map installation
After you physically install, turn on your smartphone. The system should automatically identify the new hardware and suggest you set it up. If the notification doesn't appear, go to the settings menu manually. The path usually looks like: Settings → About Phone → Storage. Here you will see general information about occupied and vacant space.
Formatting the map as an internal storage
The most effective way to increase usable storage is to use the Advanced Memory function or formatting as internal storage. Unlike Portable Storage mode, this method allows the system to encrypt the card and use it to install applications, not just to store photos.
First, go to the Settings section. → Memory, click on your name. SD-In the menu that opens, select "Format"; the system will warn you that all data will be deleted; confirm the action; after the basic formatting is completed, the sentence "Use as internal storage" may appear».
Settings → Memory → SD- Card → Format → Use as internalIf there is no direct option to transfer to internal memory (which is often found in newer versions of MIUI), the system will use the card as an additional file space by default. In this case, applications will be installed on the built-in drive, but cache and heavy files can be transferred. For advanced users, there is the possibility of activating hidden functions through ADB, but this requires a computer.
| Type of formatting | Access to PC | Installation of applications | Security |
|---|---|---|---|
| Portable | Yeah (via adapter) | No (only cache) | Low (data open) |
| Internal. | No (encryption) | Yes (full support) | High (device binding) |
| Hybrid | Partially. | Depends on the OS version. | Medium |
| Raw (no format) | Requires formatting | Unavailable | Absent. |
⚠️ Warning: Once the card is formatted as an internal storage device, it is encrypted and linked to a particular smartphone, so you can't just insert it into another phone or computer and read the data without resetting the security.
What if the “Internal Storage” item is not available?
Configure the default photo and video saving setting
One of the main reasons for the lack of space is the overflow of the photo and video folder. Xiaomi’s camera by default saves all the pictures in internal memory. To change this behavior, you need to make changes to the settings of the Camera application itself.
Open the camera app and tap the three bars in the upper right corner to enter the menu. Select "Settings." Scroll through the list to "Save" or "Memory." Activate the "Save to" switch. SD-From now on, all new images and videos will be automatically recorded on an external drive.
Also worth checking is the settings of messengers such as Telegram and WhatsApp. These apps often save the received media files to the shared gallery, taking up space. In the settings of each messenger, find the section "Data and storage" and specify the way to save on the SD-card, if such option is available in your version of the OS.
- 📸 Open the chamber. → Menus. → Settings → Save it on. SD-map.
- 🎥 For videotaping in 4K It is recommended to use only fast class cards. U3.
- 📂 Periodically check the folder DCIM on the map for the presence of hidden system files.
In addition to the camera, many photo and video editing apps allow you to select a directory to export finished projects, and by putting a folder on an external map, you save a lot of space on the main drive, which is especially true for video makers working with large files.
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Use the file manager to move existing heavy folders (Downloads, Documents) to a new map manually to free up the system partition right now.
Transfer of installed applications to SD-map
The issue of app portability (APK) is the most challenging in the Android ecosystem. Since version 6.0, Google has limited the direct ability to migrate programs to external drives for security and stability reasons, but if you format the card as internal storage, some applications may receive this option.
To check for portability, go to Settings → Applications → All apps. Select the program you want (like a heavy game). If the card is formatted correctly, the Memory or Storage button can be active. When you click on it, you will see a Move or Change button. If the button is grey, the app developer has banned the transfer.
There's a caveat: even if you successfully transfer some of the application files, they're still in the internal memory, and it's a system limitation, so you can completely free the internal partition by transferring 100% of the game data to the map, in standard mode, without root rights, but transferring cache and resources can be very effective.
adb shell pm set-install-location 2For advanced users, there is the ADB command above that enforces the installation priority, but using this method can cause some programs to run in an unstable way after a system update, and only use such methods if you understand the risks.
⚠️ Note: Do not delete files with names like Android, LOST.DIR or.android_secure These are the system folders that are necessary for the portable applications to function properly, and if they are deleted, they will cause errors in the startup of the programs.
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Even with SD-The system partition of the internal memory must always have at least 1-2 GB free space for temporary files and cache system, otherwise the phone may freeze.
Optimization and maintenance of extended memory
Once you have set up a card, it is important to maintain it regularly, file systems on external drives are susceptible to fragmentation faster than internal memory, this can lead to a decrease in read speed over time, and it is recommended to check the card every few months for errors.
Use built-in tools or third-party utilities to check, and the storage menu often has a "Check" or "Clean" option, and it's also useful to back up important data from card to computer periodically, and external drives are less reliable than internal memory, and the risk of their sudden failure is higher.
If you notice that your smartphone is slower when you access the gallery, try extracting the card, connecting it to your PC via an adapter, and performing full formatting (not fast) in the exFAT or FAT32 file system.