Modern Xiaomi, Redmi and Poco smartphones often come with limited internal storage, so using a microSD card is a vital necessity for many users.However, since Android 6.0 and up, Google's security system has implemented strict restrictions on app access to external drives.This is done to protect personal data, but often causes confusion when you try to save a file or install an app.
Device owners face a situation where the phone sees the card but refuses to write data to it or transfer photos. MIUI, like pure Android, requires explicit validation of rights for every action affecting the external drive file system. Understanding the logic of these permissions will allow you to avoid errors and effectively manage space.
In this article, we will not only look at standard connectivity methods, but also how to bypass system constraints if standard tools don’t work, learn how to format a drive properly so that it works as an extension of internal memory, and what hidden settings may be needed to fully access it.
Primary configuration and formatting of the drive
Before allowing access to specific applications, you need to make sure that the card itself is properly integrated into the file system of the smartphone. When you first install Xiaomi usually offers to choose the mode of use: as a portable storage or as part of internal memory. Choosing Portable mode is the most secure and compatible option for most users, allowing you to easily retrieve the card without losing data.
If the system didn't offer formatting automatically, you'll have to perform this procedure manually through the settings.The process takes only a few minutes, but requires a stable battery charge of the device.
To start, go to the settings menu and find the storage section. Depending on the version of the MIUI shell, the path may vary slightly, but the logic remains the same for all models of the brand.
💡
Use U3 or V30 speed memory cards to record 4K video, otherwise buffering errors and file saving crashes may occur.
Once formatting mode is selected, the system will create the required folder structure, including the hidden Android/media and Android/data system directories, which will then store data from applications that have received the appropriate permissions, and without proper formatting, permission requests may simply not appear or not work correctly.
Configure access rights through the system menu
The basic permission management mechanism in Android and MIUI It's focused in a special security section, and you can manually specify which programs are allowed to read and write data to the external security. SD-This is a critical step, because by default, many applications only have access to their own folders.
To open the permissions menu, you need to go to your phone's settings. Navigating the menu requires careful attention, because items can be hidden in subcategories.
- 📱 Open “Settings” and go to the “Applications” section».
- 🔒 Select “Application Permissions” or “Manage Permissions».
- 💾 Find the category "Memory" or "Files and Media».
- ✅ In the list that opens, find the desired application and activate the access switch.
In some versions of the firmware, access to SD-The card can be combined with shared storage, and if you don't see a separate item for the external card, look for permission to work with Photo and Video or Music and Audio. Xiaomi groupes these rights to simplify the interface, but functionally they give access to all files on the drive.
It's worth noting that even after you turn on the toggle in the settings, when you first start up, the app can re-request confirmation through the system window. This is normal Android security behavior that you can't ignore. If you reject this request, the app won't be able to save the file even if the slider in the settings is activated.
Solving Access Problems Through File Manager
Often, users try to copy a file to a memory card through a standard Explorer and are faced with an access error message. At this point, a system dialog box appears on the screen asking them to provide access to the sdcard folder, many users are scared of this window or do not understand which folder to choose.
The system requires you to manually specify the root directory of the external card, so that the conductor application does not have access to the entire phone, but only to a particular drive. The path selection window usually displays a list of available storage facilities, including internal memory and an SD card.
You need to click on your card name (often denoted by SD Card or by volume, such as 64GB), and then click on the "Use this folder" or "Allow" button in the window that opens, and then access will be open not only for current action, but for all future operations with files.
⚠️ Note: If you accidentally selected the wrong folder or refused access, the application can block the possibility of re-querying, in which case you will have to clear the cache of the conductor application through the settings to reset its state and call the permission request window again.
If the standard MIUI file manager is not behaving properly, it makes sense to install a third-party explorer, such as Total Commander or FX File Explorer.These applications have more flexible access rights settings and often handle system permission requests better on Xiaomi devices.
Using the card as internal memory
A feature known as Adoptable Storage allows you to turn the SD-In this case, the card is encrypted and linked to a specific device, after which you can install applications and transfer their data to it without additional rights requests.
On Xiaomi smartphones, this feature is often hidden from the average user, but it can be activated via an engineering menu or a customized app. ADB-However, the risks should be considered: if the card fails, the applications installed on it will cease to work, and data can be lost without the possibility of restoring it to another device.
Activating the mode will require a computer connection and USB debugging, an advanced method that is recommended only for advanced users who understand the consequences of changing partition structure.
Command to activate via ADB
Once the card is in internal memory mode, the system will automatically start to transfer data and application caches. The speed of the smartphone may change depending on the speed class of your memory card. If the card is slow, the system interface may become less responsive.
Diagnostics and elimination of recording errors
Even after you set up the rights, you can have situations where you can't write data, most often with the card file system. Android natively supports FAT32 and exFAT file systems. If your card is formatted in NTFS (Windows standard), your phone can only read files, but not write them without special drivers or root rights.
The problem can also be in the physical lock switch on the card adapter (if you use an SD adapter) or in the software lock. Check if the card is worth reading only. Sometimes it helps to re-format directly in the phone, which ensures that the folder structure is created correctly.
The table below shows the main symptoms and ways to solve them:
| Symptoms. | Possible cause | Decision |
|---|---|---|
| The file is copied, but disappears after the reboot | The application has no rights to record | Check the permissions in the application settings |
| The “No Access” Error When Saving a Photo | Not selected by default storage | In the camera settings select SD-map |
| The map is determined, but there are no files | The file system is not readable. | Formatting to exFAT via phone |
| The system proposes to format the map | The file system is damaged. | Copy data on PC and perform formatting |
If neither method works, the memory card itself may have been physically damaged or has run out of write cycles, in which case the software access settings will not help, and the drive will need to be replaced.
☑️ Diagnostics SD-map
Features of working with multimedia on different versions of MIUI
The MIUI shell has its own features in file management: older versions (MIUI 10-12) have more open access to the file system, allowing applications to freely scan the map. In newer versions (MIUI 13, 14 and HyperOS), security policies have been tightened, following the general trends of Google.
Gallery and voice recorder may react differently to a change in storage, for example, a voice recorder may continue to write to internal memory, ignoring settings, if it is not given explicit permission on the first run after the system update, in which cases cleaning the data of the recorder application itself helps.
Also, it is worth considering that some Xiaomi system applications may require access to Files and Media to correctly display album covers or thumbnails of videos stored on an external map. Without this permission, the gallery can display empty screens instead of images.
💡
On the new versions MIUI access to the Android folder SD-map by third-party applications blocked by default, requires the use of a system conductor or special permissions.