Modern smartphones, including the popular Xiaomi Redmi 9A model, often feature built-in limited storage that quickly fills with photos, videos and apps. Expanding memory with a microSD card is a standard solution, but the Android operating system has strict security policies that limit applications' access to external drives. Users often face a situation where the gallery does not see new pictures, or the file manager cannot save a document on a flash drive.
The problem lies in the MIUI and Android permissions system, which requires explicit user confirmation for every action related to writing data to an external storage, which is designed to protect personal data from malware, but sometimes creates inconveniences during normal operation of the device. In this guide, we will detail how to properly configure the memory card and grant the necessary access rights to various applications.
It is important to understand that the configuration process may vary depending on the shell version and security updates installed. It is critical to not miss system requests when you first install the card, as improper formatting can lead to data loss or inability to use the drive as internal memory. We will look at all the steps from the physical installation to fine-tuning access rights through the system menus.
Primary configuration and formatting of the drive
Before you ask about access rights, you need to make sure that the system correctly recognizes the installed drive. SIM-map, Redmi 9A If the notification does not appear, check the integrity of the card contacts and the correct installation in the slot.
The system will offer two uses: as portable storage or as internal memory. Portable storage is the most secure and compatible option, making it easy to transfer files to other devices. Internal memory mode encrypts data, making the card useless without this particular smartphone, but allows you to expand the scope for installing applications.
The formatting process cleans the map completely, so make sure it doesn't have any important data, or copy it to your computer beforehand. Once the formatting is complete, the system will create the required file structure of the folders, which will be requested by various programs in the future.
⚠️ Attention: The formatting process is irreversible. All data that was on the map before the setup will be permanently deleted. Make sure you choose the right drive if you have multiple devices connected to the phone. USB-device.
To check the status of the card, go to the settings menu. The path usually looks like: Settings → About phone → Storage. This shows the total volume, occupied space and speed of the drive. If the card is defined as "damaged" or "Not supported", try formatting it on your computer in the FAT32 or exFAT file system.
☑️ Checking the map's readiness
Android Permissions System and Data Security
The Android 10 operating system on which Redmi 9A is based uses a permission model based on real-time requests.This means that the application does not have access to default files, even if they are on an external drive. The Storage Access Framework (SAF) mechanism requires the user to manually specify the root folder of the memory card when the program first accesses files.
When you first try to save a file or open a library, a permission requesting system dialog will appear on the screen, which can look like a pop-up with the text "Allow access to files on your device?". Ignoring this request will result in a write error or an empty list of files in the application.
In some cases, especially in third-party file managers, the system can open a special folder selection interface, and you need to be careful: often the default opens internal memory, and the user needs to switch to the directory on his own. SD-At the bottom of the screen, a button may appear "Use this folder" that you need to activate.
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If the rights request window doesn’t appear, try clearing the problematic app’s cache through Settings → Apps → (Select App) → Storage → Clear the cache. This will reset the temporary rights data.
The new versions of Android differentiate between permissions to access media files and access all files, requiring separate confirmations to access photos, videos and audio, and separate confirmations for system files, which increases security but makes it harder for inexperienced users to set up the initial setup.
Step-by-step: granting rights in the file manager
So if you look at the default Explorer application, or a popular analog, like MI File Manager, it's going to try to scan all the storage available on the first run, and if you only see internal memory, you're locked out of the external drive.
You need to go to the settings of the guide application itself or click on the menu icon (usually three stripes or dots). SD-The system will redirect you to the folder selection interface, where you need to find a memory card icon, often labeled as sdcard or by the name of the card manufacturer.
Once you select the root directory, click the confirmation button, and another system window will appear on the screen, warning you that the application will access all the files in this folder and its subfolders, a standard procedure required for the file manager to work properly.
| User action | Expected system response | The result |
|---|---|---|
| Starting a File Manager | Scanning of internal memory | Displaying phone files |
| Trying to open SD-map | Request for System Permission | The emergence of the Android dialog box |
| Folder selection and confirmation | Granting of access rights | Successful display of map content |
| Attempting to record a file | Checking of record rights | The file is successfully saved to an external medium |
If you don't get access after you've done all of this, try restarting your device, and sometimes the media scanner service needs to restart to index new access rights and display files in a gallery or explorer.
Access settings for gallery and multimedia
Special attention should be paid to access to media files for gallery and camera applications, and users often find that photos taken on camera are stored in internal memory, ignoring the use of the camera. SD-The map, or the gallery, doesn't display existing images on the flash drive, but it's solved through the settings of the particular application.
Go to the Camera app settings. Find the save section and switch the switch to Save to the save button. SD-The map is now in active position, and then all new images and videos will be automatically recorded to an external drive, freeing up the interior space.
You may need to manually scan old photos in the gallery, and some versions of MIUI have a feature called "Update Albums" or "Scan Device," which you can run to recheck the file structure and add new media files to the media server database.
⚠️ Note: If you move large volumes of photos manually, do not interrupt the transfer process. communication interruption can damage the file table and lose part of the archive of photos.
Also, check the permissions in the general Android settings menu. Go to Settings → Apps → All apps → Gallery → Permissions. Make sure that the sliders opposite the Photos and Videos, Files and Media or Storage are enabled. Without these basic permissions, the app will not be physically able to read the data from the map.
Solving Access and Recording Errors
Despite the correct setup, there can be situations where an application reports a write error or refuses to open files. A common cause is the card file system. If the card is formatted in NTFS, Android can only read it, but not write data without special drivers or root rights.
Another common problem is a corrupted file system or sector errors, in which case the phone may suggest formatting the card each time you turn on. Don't agree right away, try checking the card on your computer using the chkdsk utility or specialized recovery software.
If the problem is with the access rights of a particular application, try to remove updates or reinstall it. Sometimes, in the process of updating the application, the configuration files responsible for interaction with the Redmi 9A storage system are lost.
What if the card is defined as empty?
In rare cases, cleaning the data of the Media Scanner system application helps. Find it in the list of all applications (you may need to turn on the system process display) and select Clear Data. After restarting, the phone will index all files again, which often solves display problems.
Using the card as internal memory
The "Advanced Memory" function allows integration SD-The card is in internal storage, which allows applications to be installed directly on the flash drive, a useful option for models with a small amount of internal memory, such as the basic versions of Redmi. 9A.
To activate this function, go to Settings → Warehouse, select yours. SD-The system will warn you that the card will be encrypted and will not be able to work on other devices without re-formatting.
Once the process is complete, the system will move some of the data and the application cache to a new volume, which can take a considerable time during which it is better not to use the phone, and the interface speed can decrease slightly if the card write speed is lower than that of the internal memory.
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Using the card as internal memory greatly enhances the installation of applications, but requires a high-speed card of the UHS-I class or higher for comfortable operation of the system.
Therefore, regular backup of important information to the cloud services or computer becomes a critical element of the operation of the device.