Xiaomi, Redmi and Poco smartphone owners often face a situation where, after installing a memory card, the system stops working correctly with files, requiring additional permissions. This is a standard Android security mechanism that restricts access to external drives for the sake of user data security. Without the right setup, you will not be able to save photos, music or documents to an external medium, which quickly leads to overflow of internal memory of the device.
The process of activating access can vary depending on the version of the MIUI shell or HyperOS, as well as the model of your gadget. Sometimes the system itself suggests choosing the mode of use of the drive, but in other cases the user has to manually configure access rights through hidden menus or file managers. Understanding these processes is critical for stable multimedia functions.
In this article, we will take a look at all the steps of configuration, from physical connection to solving complex software errors. You will learn how to format the media correctly so that it becomes available for recording, and which applications are best for managing the file system. Attention: formatting the memory card as an internal storage will completely destroy all the data on it, so be sure to back up important files before starting procedures.
Preparation of memory card and physical connection
The first step is to properly install the MicroSD card in your device’s slot. Most modern Xiaomi models use a combined tray where you can install two. SIM-It's important to carefully remove the tray with a special paper clip without damaging the contacts, and install the drive on the correct side.
Once the smartphone is turned on, the system must automatically detect the new device. If this does not happen, check the purity of the contacts on the card itself and in the phone slot. Dust or oxidation can interfere with normal connection, which makes it impossible for Android to identify the drive.
Often, users are faced with a situation where the phone sees the card but can't read it. This may indicate a file system that the device doesn't support by default. The most compatible format for mobile devices is FAT32 or exFAT for large-volume cards.
- 🔌 Make sure the phone is completely off before removing or installing the memory card to avoid short circuit.
- 💾 Check the compatibility of the card size with your smartphone model (usually supported cards up to 256 GB or 512 GB).
- 🧹 Wipe the card contacts with a soft dry cloth if the device is not recognized after installation.
If the physical connection is successful but file access is not available, go to software configuration. Don't ignore the system's notifications to format, as this is the main way to bring the file system to the desired standard.
Basic configuration and formatting of the drive
Once you have installed the card, MIUI will usually give you a notification of a new device, and by clicking on it, you will be taken to the settings menu, where you can choose how to use it, you can use the card as a portable storage or as part of internal memory, the former option being preferred if you plan to transfer the card to other devices often.
For formatting, go to the Settings menu → The phone. → Storage. This displays the storage and status information of the connected drives. SD-map from the list and find the menu item, usually hidden in the top three dots in the top right corner of the screen.
☑️ Pre-formatting verification
In the menu that opens, select Format. The system will alert you that all data will be deleted. Confirm the action, and the process will take from a few seconds to a couple of minutes depending on the storage capacity. Once completed, the card will be ready to write files.
⚠️ Note: If the menu does not have a formatting button or is inactive, the memory card may be physically damaged or has an incompatible file system that requires formatting on a PC.
Once formatted successfully, the system will assign a new name and path to the map, and now applications can request access to that path to save data. If you're using a camera or a voice recorder, check their settings to see if you've selected a save on the map. SD-default-card.
Granting permissions for file managers
The most common problem is that a standard explorer or a third-party file manager can’t see files on the map, because of the security limitations of Android 10, 11, 12 and above, and apps need to explicitly point the path to the card’s root directory so that they can have full access.
Open your file manager (e.g., Xiaomi's Explorer or File Manager+). When you try to copy a file to a map or clear it, you'll see a pop-up requesting access. Click OK or Set up. A system window with a tree-like folder structure will open.
In this window, you need to find your memory card. It can be displayed as sdcard1, MicroSD, or by manufacturer name. Select the root folder (the topmost) and click Use this folder at the bottom of the screen. Then confirm the action in the second pop-up by clicking Allow.
What to do if the "Allow" button is inactive?
After this procedure, the application will have permanent access to the file system of the drive, you can freely copy, delete and remake files. If you install another Explorer, the procedure will have to be repeated for it, since the rights are issued individually for each application.
Access settings for cameras and messengers
Special attention is required by applications that actively work with media files. Camera, Telegram, WhatsApp and video editors should have access to the media. SD-A map to save content, in modern versions. MIUI This is often regulated through a permissions manager.
Go to Settings → Applications → All apps. Find the right app on the list, like Camera. Go to Permissions and look for Files and Media or Memory. Make sure it ticks "Allowed" or "Always Ask," although you'd better choose full access.
For instant messengers, it's also important to configure the save path inside the app itself. Open WhatsApp, go to Settings. → chat → Backup or storage settings. If you have the option of selecting a location, please specify SD-This will free up a significant space in the internal memory.
| Annex | Where to look for settings | Permission required | Risk of error |
|---|---|---|---|
| Camera. | Camera settings → Save | Recording in storage | Tall (no video written) |
| Telegram | Settings → Data and memory | Access to photos/files | Medium (cache overflows the phone) |
| VK Music | Settings → Cash | Change files | Low (online mode) |
| Google Photo | Settings → Reservations | Full access | Medium (photos not saved) |
Remember that some system applications may not support external storage due to manufacturer limitations, and only third-party Google Play can help in such cases.
Using the card as internal memory
Adoptable Storage allows you to combine the internal memory of the phone and the memory card into a single space, which is useful for devices with a small amount of internal storage (16-32 GB), but on the MIUI shell this feature is often hidden or unstable.
If your phone supports this option, when formatting the card, select "Use as internal storage." The system will format the card in a closed format and it will only be available on that particular device. You will not be able to transfer the data to another phone without formatting.
Using the card as internal memory has its risks: the read and write speed of conventional microSD cards is much lower than that of embedded eMMC or UFS memory. This can lead to slowdowns in the interface, long start-ups of applications and system hangs.
⚠️ Note: It is not recommended to use cheap memory cards of the class speed below 10 (Class 10) as an extension of internal memory.
Activating this feature on devices where it is hidden sometimes requires a computer connection and the use of ADB debugging. The sm partition command allows you to force the drive to convert, but it requires skill and can lead to loss of warranty or data.
Solving Common Access Errors
Users often face an error "SD-The card is corrupted" or "Formatting required" even if the card is all right. This may be due to file system logic errors. Try connecting the card to your computer through the card reader and perform error checking with Windows.
Another problem is that the app says "No access" even though the permission is given, so try clearing the cache of the guide app itself. → Annexes → Conductor → Memory. → Clear cache.Rebooting the device also often helps reset the time glitches of a media scanner service.
If the phone stops seeing the card after it's gone off sleep, there may be a problem with the contacts or the card itself. The memory cards have a limited resource of overwriting cycles. If the card is older than 3-5 years, it can go into read-only mode to protect the data, which does not allow anything to be written or deleted.
💡
Use the SD Card Formatter utility from the SD Association for low-level formatting. It restores the correct partition structure better than standard Android tools.
In rare cases, the problem lies in the HyperOS or MIUI system update, which changes the paths to files, in which waiting for the Explorer application to update or installing an alternative file manager such as Total Commander or Solid Explorer helps.