Budget smartphone owners often face a lack of built-in space, and Xiaomi Redmi 6A is no exception. 16 or 32 gigabytes of built-in memory are catastrophically lacking for installing modern applications, storing high-resolution photos and videos. It is at this point that a microSD memory card comes to the rescue, which allows you to significantly expand the capabilities of the device. However, after simply physically installing the drive into the slot, users often find that the system does not see new files or does not give permission to write them.
The problem is that the MIUI-branded Android operating system requires explicit permission from the user to access external drives for security purposes, so that malicious software can’t uncontrollably encrypt or delete your personal data. The process of activating and properly configuring the drive on the Redmi 6A has its own nuances, which we’ll discuss in detail in this material. Without the right setup, the card can only work in read mode or be completely hidden from the file manager.
In this article, we will look at all the stages: from the initial installation and physical connection to the deep configuration of access rights through the system menus. You will learn how to format a drive so that it becomes a full-fledged extension of internal memory, as well as how to solve typical errors when the phone writes «SD-The card is damaged" or "Formatting required" The correct configuration will allow you to store terabytes of information and run heavy games without lag caused by overflowing main storage.
Primary installation and physical connection of the drive
Before you go to software settings, you need to make sure that the physical connection is correct. 6A a combined slot, which means that you can install either two SIM-card SIM If you have two SIMs, the second slot is occupied, and you can't install a flash drive without losing one of the SIM cards.
Once the card is installed and the device is turned on, the system should issue a characteristic audible signal or show a notification of the connection of a new storage device. If this does not happen, check the purity of the contacts on the card itself and in the phone slot. Sometimes oxidation or dust interfere with the normal connection, and the phone simply does not "see" the presence of an external medium.
⚠️ Warning: Never remove a memory card while the phone is on and writing data is in progress.This can lead to irreversible loss of information and logical damage to the file system, after which the drive will require formatting.
It's important to understand the difference between modes of operation. By default, Android can offer to use the card as "Portable Storage" or "Internal Storage". The first option is suitable for transferring photos and music between devices, the second is for installing applications and expanding system memory. The choice of mode depends on your goals, but the second option is most often required to maximize the capabilities of the Redmi 6A.
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Use memory cards of class speeds not lower than Class 10 or UHS-I. Slow cards (Class 4 or 6) will significantly slow down the smartphone, especially if they are installed on applications.
Basic configuration and formatting in the MIUI system
After the physical connection is completed, the operating system will prompt you to configure a new drive. SD-You click on it, you go to the settings menu, and here the system will tell you that all the data on the media will be deleted. MIUI Creates a new file structure compatible with Android access rights.
The formatting process takes anywhere from a few seconds to a couple of minutes, depending on the size of the card. During this operation, it is strictly forbidden to turn off the phone or remove the card. If the process is interrupted, there is a high probability that the drive will become unreadable and require recovery through the computer.
If you don't get an automatic notification, you can manually set up the settings, go to the settings section, look for "Storage" or "Memory." From the list of available drives, select yours. SD-The system will offer several uses: cleaning and use as internal storage or as a portable one. Choosing the "Internal storage" option will make the card encrypted and tied to this phone specifically.
☑️ Pre-formatting verification
It’s worth noting that once formatted as an internal storage, the card will become invisible to other devices (cameras, computers) without re-formatting, a security measure implemented in Android 6.0 and higher. Your files will be protected, and even when you extract the card, an outsider will not be able to read the data without access to the Redmi 6A smartphone itself.
How to grant permission to access files
Often users are faced with a situation where the card is formatted, but applications (such as a gallery, voice recorder or file manager) can not save data to it. This means that permission to access is not granted. In modern versions of MIUI, the application will request access when you first try to write, you need to find the file system in the list (usually designated as sdcard1 or has a map size) and click the "Allow" button.
If you don't get an automatic request, you can manually give permission through your application settings. Go to Settings → Applications → All apps. Find the application you want (like Camera or Explorer). Go to Permissions and find Files and Media or Memory. Make sure the slider is activated.
In some cases, especially when using third-party file managers, you need access to the root directory. The system will show a screen with a folder tree. You need to select the root. SD-The card and the blue "Use this folder" button (or similar) give the application full rights to read, write and modify files on external media.
⚠️ Warning: Be careful about giving files to unknown applications from unreliable sources.Write permission gives the program full control over the contents of your card, which can be used by encryption viruses.
For system applications like standard Gallery or Music, access is usually granted automatically after formatting, but if you use a third-party player or document editor, manually verifying access rights is a must, without which you can only view files, but not save new ones.
Transfer of applications and data to an external drive
One of the main goals of memory expansion on Redmi 6A is to install heavy applications. However, not all programs support portability. If you format the card as an internal storage, the system itself will suggest migrating data when you install the new game. If the card is portable, the transfer is only possible for applications whose developers explicitly authorized it.
To move the already installed application, go to Settings → Annexes → All applications. Select the program you want. If transfer is possible, move to the button. SD-If the button is grey or missing, it means that the application is critical to the system or does not support such a feature, in the latter case, only formatting the card as internal storage (if the Android version allows).
When transferring data, it is important to consider the speed of work. The built-in memory of a smartphone is usually faster than even a microSD card. Therefore, the system applications and programs that you use all the time (messengers, browsers) are better left on the internal drive. It is worth uploading archives of photos, videos, music and games with large cache files to the card.
| Type of data | Recommended seat | Reason. |
|---|---|---|
| System files | Internal memory. | Ensures the stability of the OS |
| Messengers (WhatsApp, Telegram) | Internal memory. | Quick access to the message database |
| Photos and Videos | SD card | They take up the most space, are easily carried |
| Cache of games and maps of the navigator | SD card | Large data volumes do not require high speed |
| Music and films | SD card | Ease of transfer to other devices |
Check the internal storage regularly. Even with a memory card, the system partition can be overflowing with temporary files. Use built-in cleaning tools or third-party cache removal utilities to keep the Redmi 6A running fast.
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Moving apps to a map can slightly reduce the speed of their launch, but it is the only way to free up critical system space on budget models.
Solving Common Errors and Access Problems
Users often face an error «SD-The card is corrupted. Try restarting the device. It doesn't always mean a physical breakdown. Often the problem is in the file system. Android prefers exFAT or the file system. FAT32. If the card has been formatted in NTFS On a computer, the phone may not see it or require formatting, so the solution is to connect the card through the card reader to the PC and format it into a computer. FAT32 (for cards up to 32 GB or exFAT (for cards over 32 GB).
Another common problem is the card suddenly disappearing from the system, which can be due to poor contact in the slot or software failures of the MIUI shell. Try cleaning the Media Storage cache. To do this, go to the application settings, turn on the system processes, find the service and click "Clean".
If the phone writes "File is corrupted" when trying to open a photo or video, it may be interrupted due to battery drain or failure, in which case checking the disk for errors will help. Connect the card to the computer, right-click on the disk, select "Properties" → "Service" → "Check". Automatic error correction often returns the files to readability.
⚠️ Note: If a memory card starts to (often) produce read errors or requires constant formatting, this is a sure sign of its physical wear. Flash memory has a limited resource of write cycles.
Also worth mentioning is the problem with access rights after a system update, sometimes after a MIUI update, application permissions are reset, and if after the update you stop seeing files on the map, just re-travel through the settings of each important application and confirm access to the storage manually.
Using a card reader and working with a PC
For easy file management, Redmi connection is often required. 6A It's connected to a computer. USB-Cable select the mode of operation "File transfer» (MTP). This computer will see the internal memory and SD-It's like discs, and it allows you to quickly drop gigabytes of photos or movies without using cloud services.
If you are using an external card reader connected through OTG-cable, the process is similar. USB-If the card requires a lot of power to write and the phone is low, access can only be limited to reading.
When working with files on a PC via your phone, make sure that you do not disturb the folder structure. Android, DCIM, MIUI system folders are better not to touch unnecessarily. Create your own folders to sort documents, so you do not get confused in files and do not accidentally delete the system settings of applications.
What if the computer can’t see the card through the phone?
Using cloud storage in conjunction with SD-Maps are a great strategy (backup) and set up automatic uploads of photos from the map to the cloud (Google Photos, Yandex.Disk), but leave the originals on the map. This will create a double level of data protection: If the card fails, copies will remain on the Internet, and if the Internet is not available, the files will be on the map.