Modern Xiaomi Redmi smartphones are equipped with powerful processors and high-quality screens, but the internal memory is often not enough to store a huge number of photos, 4K videos and heavy games. That is why many users continue to actively use microSD memory cards to expand storage. However, the Android operating system, starting with version 6.0 Marshmallow and especially in the shell of MIUI, has implemented strict restrictions on access to external drives for the sake of data security.
When faced with a situation where you can’t copy files, delete music, or install an app on a flash drive, it’s easy to get confused about the system’s endless requests. Often, a standard file manager simply refuses to perform the operation, citing a lack of rights. The key here is to understand the difference between a physical card connection and a programmatic recording permission that needs to be manually activated for each application. In this article, we’ll look at all the nuances of granting such rights so that you can fully manage your data.
Below we will take a detailed look at the algorithms for different versions of firmware, how to bypass system constraints and how to diagnose possible hardware malfunctions. You will learn how to format the drive correctly and adjust the write priorities, which will allow you to forget about the lack of space on the internal disk.
Why the system restricts access to external storage
The main reason why Xiaomi and other vendors require permissions is because of the Android security architecture. In early versions of the operating system, applications had virtually unlimited access to the entire file system, making user data vulnerable to malware. With the introduction of the Scoped Storage mechanism, access to the root directory SD-The cards were strictly regulated.
When you try to move a file or clear a cache through a third-party explorer, the system blocks the action, since the application does not have the status of a trusted medium to work with an external media. This is not a bug, but a security mechanism that prevents the accidental deletion of important system files or encryption of data by encryption viruses. The user must explicitly indicate to the system that he trusts a particular application (for example, Total Commander or FX File Explorer) to work with this partition.
⚠️ Note: Attempts to obtain Root rights to circumvent these restrictions may result in the loss of warranty on the Redmi device and disruption of banking applications.
In addition, limitations can be associated with the file system: If the card is formatted in NTFS or exFAT format, and your smartphone supports only FAT32, access to the record may not be possible without flashing or using special drivers, which is found on older Xiaomi models. Modern devices usually read all popular formats, but can only write data to compatible sections.
Basic configuration and formatting of the memory card
Before you ask the system to access, you need to make sure that the memory card itself is correctly recognized by the smartphone. Often the problem is not the permissions, but the wrong formatting or damage to the contact group.
Go to your Redmi's settings menu. Find the partition that controls your device memory. Depending on the version of MIUI, the path may vary, but most often it is at Settings → Phone → Storage or Settings → Memory. Here you will see a list of connected drives. If the card is displayed as "Empty" or "Not supported", it needs to be formatted.
- 📱 Choose yours. SD-map from the list of available storage facilities.
- 🗑️ Click the "Clean" or "Format" button at the bottom of the screen.
- 💾 Confirm the action by agreeing to the deletion of all data on the media.
- ✅ Wait for the process to be completed and restart the smartphone.
It's important to understand that when formatting, the system will offer two options for using memory: as a portable storage device or as part of internal memory. The first option (Portable Storage) allows you to easily transfer the card between devices, but applications will not be able to fully transfer to it. The second option (Internal Storage) encrypts the card for a particular device, making it unreadable on other phones, but allowing you to install applications and game cache on it.
☑️ Memory card check
How to provide access through a standard file manager
When you first try to copy or delete a file SD-map through a standard conductor MIUI, The screen will have a permission request dialog box, which is a routine procedure that can't be ignored, and it can be called Access to Data or Allow Access to a folder".
This window usually displays a path to the directory the app is trying to access (e.g. /storage/emulated/0/Android/media). You need to click on the "Allow" or "OK" button. In some cases, the system will require you to select a specific folder. If this happens, look in the list for the card's root directory (often referred to as SD Card or MicroSD) and click "Select" or "Use this folder" at the bottom of the screen.
Sometimes, especially when you update your Xiaomi firmware, the settings are reset and the request comes back, and that's normal security behavior. If the window doesn't appear automatically, try doing an action that requires a record, like creating a new folder on the map or moving a photo from the gallery there, and that will force you to request permissions.
⚠️ Note: If you accidentally click Cancel or Prohibit, the system will remember this choice. To correct the situation, you need to again try to perform the write operation or clear the cache of the conductor application in the settings.
Configure access rights for third-party conductors
Xiaomi’s standard Explorer may seem too simple for power users who prefer powerful tools like Total Commander, Solid Explorer, or X-plore. When they first run, such applications also request memory access, but the system window may not pop up, or it may not be enough for full functionality.
To grant full permissions to a third-party application, go to Settings → Apps → All apps. Find your file manager in the list. Click on Permissions. Make sure the memory or file and media switch is activated. New versions of Android 11/12/13 on Redmi may also require access to Manage All Files.
If, after enabling permissions in the settings menu, the app still doesn't see the files on the flash drive, use the built-in access mechanism. Try renaming any file on the card through this explorer. The system will open a window asking you to confirm access. In the Android interface that opens, click on the three bars in the upper left corner, select yours. SD-map and confirm the choice with the button "Use this folder".
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For maximum convenience, use conductors that support dual-panel work, such as Total Commander. This allows you to quickly copy files between internal memory and the storage of the device. SD-single-touch.
Solving Access Problems and Reading Errors
Even after all permissions are granted, there may be situations where files are not copied or the card is identified as corrupt. One common reason is file system incompatibility. A large card (over 32 GB) formatted in exFAT may not be readable on older Redmi models without a kernel or patch update, and formatting in FAT32 using the SD Formatter utility on your computer will help.
It can also be a physical problem, and long-term use can degrade memory cells "SD-The card is "damaged" or requires formatting, although it works on the computer, perhaps the storage resource is exhausted.
| Symptoms. | Possible cause | Method of decision |
|---|---|---|
| Map not determined | Contact oxidation or driver failure | Wipe contacts, reboot your phone |
| Files are copied but not opened | Damage to the file system | Error Checking on PC, Formatting |
| The request for rights appears constantly | Conductor cache failure | Clear the data of the "Conductor" application |
| Impossible to delete the file | The file is used by another process. | Close applications, restart the device |
In rare cases, access is blocked by antivirus or system optimizer MIUI Security. Check your security settings and make sure your file manager is not blacklisted or quarantined. It is also worth checking if the Read Only mode on the card adapter itself is enabled (if you use an SD adapter), although this is software-based on the microSD.
Use of the USB-OTG empowerment
If the built-in slot is busy or damaged, you can use the external drive through the USB Type-C port. To connect flash drives or card readers to Xiaomi Redmi, you will need support for USB OTG (On-The-Go) technology, which is present in all modern models of the brand.
When connecting an external flash drive through OTG-cable, the system will also request permission to access. SD-map: you need to confirm the connection in the window that appears and allow the file manager to scan the new device.
What to do if the OTG does not work?
If you're connecting a capacious SSD-disk without its own power, battery charge smartphone may not be enough for its stable operation, which will lead to constant shutdowns. USB-powerhouse.