Owners of budget and mid-budget smartphones often face a lack of space. Xiaomi Redmi 9 model is no exception, offering a limited amount of built-in storage, which is quickly filled with multimedia content and applications. Clearing cache or removing unnecessary applications gives only a temporary effect, so expanding memory becomes a vital necessity for comfortable use of the device.
Using a microSD card is the most effective solution to memory overflow, allowing you to save photos, videos, music and even some applications on an external medium, leaving the system partition free for the operating system to work. Proper file allocation helps to avoid system errors and slow down the interface.
The process of transferring data to Redmi 9 has its own peculiarities, depending on the version of the MIUI shell and the type of content being moved. In this article, we will discuss in detail all the available methods, from manual file sorting to full adaptation of the memory card to the format of the internal memory of the device.
Preparation of the memory card for work
Before any data manipulations begin, you need to make sure that the memory card is properly formatted and properly formatted.The file system must be compatible with Android, usually FAT32 or exFAT. If the card is new or previously used in other devices, it is recommended to format directly through the smartphone menu to eliminate possible read errors.
Insert the card into the appropriate tray slot SIM-When you turn on the device, the system automatically prompts you to configure the new drive, and it's important to choose the right mode of use, because it depends on whether you can later migrate applications to it or only multimedia.
⚠️ Note: Formatting a memory card completely deletes all the data stored on it. Be sure to back up important files on your computer before starting the procedure.
To check the speed of writing and reading, you can use specialized utilities available on Google Play. Low-speed class maps below 10 can cause delays when shooting high-resolution video or installing heavy games. A high-quality drive is the key to stable multimedia functions of your Redmi 9.
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Use a memory card of proven brands (SanDisk, Samsung, Kingston) with a speed class not lower than UHS-I Class 10 to avoid problems with recording 4K video.
Manual transfer of photos and videos through the Explorer
The easiest and most reliable way to free up space is to manually move media files. The File Manager app, built-in, makes it easy to manage the file structure. Find the DCIM and Pictures folders, where camera shots and screenshots are saved by default.
Select the files you need or entire folders, click on the "More" button, and select the "Move" option. SD-This method is ideal for archiving old photos that you want to save but rarely view.
☑️ Pre-transfer check
When moving large amounts of data (several gigabytes), the process can take time: Do not interrupt the operation or remove the card before copying is completed to avoid damaging the file structure.
Setup to save camera data by default
To avoid manually transferring files in the future, it is advisable to change the camera settings. Open the Camera app, go to the settings (cog icon) and find the item responsible for priority storage. Activating this feature will allow you to save all new photos and videos immediately on the camera. SD-map.
Similar settings exist for instant messengers such as Telegram and WhatsApp, where the data and memory sections of these apps can specify a path to save downloadable media files, which will prevent the internal memory from quickly filling up with correspondence and forwarded messages.
You should note that when using a low-quality memory card in continuous shooting mode, there may be delays. If you notice that the camera is “hanging” after a series of shots, try returning the default storage to internal memory or replacing the card with a faster one.
Why are some photos not being transferred?
Transfer applications to memory card
Unlike photo porting, migration of applications to Xiaomi Redmi 9 with MIUI shell has limitations. Not all programs support the move function, and developers often block this feature to ensure stability. You can check the portability in the Settings menu → Apps → All applications.
Select the desired application and find the “Move to” button. SD-If the button is active, the system will move some of the application data, freeing up the internal space, and if the button is missing or inactive, then the developer has banned the movement, and it is impossible to get around this with standard means without root rights.
| Type of application | Possibility of transfer | Impact on speed | Recommendation |
|---|---|---|---|
| Social media | Partially. | Average. | Transfer media cache |
| Games | Depends on the game. | High. | Leave it in your internal memory. |
| Office programmes | Yes. | Low. | Can we move it? |
| System services | No. | Critical. | Don't touch it. |
Even if you successfully transfer some of the app data, it's still in internal memory, which is normal for Android to run critical components quickly, and you don't expect to be able to get out of space by only moving the programs.
Using the card as internal memory
The Adoptable Storage feature allows you to format the card so that the system will consider it part of the internal storage, which allows you to install any application on the map, but makes the card unreadable on other devices without re-formatting.
Activating this feature on MIUI often requires special commands via ADB or using third-party ulets, as the manufacturer may hide this option.The process requires high card speed, otherwise the smartphone interface will become noticeably slower.
⚠️ Note: When formatting the card as internal memory, all data on it will be destroyed, and the card itself will be encrypted and tied exclusively to this smartphone.
This method is suitable for experienced users who understand the risks: if the card fails, access to the applications installed on it will be lost, and the wear of the card during this use is much faster due to the constant recording of system logs and cache.
Common mistakes and ways to solve them
In the process of work, users may encounter a message «SD-The card is corrupted" or "Formatting required. "This often indicates logical errors of the file system, which can be corrected by formatting through the computer using the utility. SD Formatter.
If the phone can’t see the memory card, try scrubbing the contacts neatly and inserting them again.The problem may be that the card’s volume is not compatible with the smartphone’s controller; Redmi 9 officially supports the cards to a certain volume, which can cause instability.
If you have a record error, check if you have physical recording protection (if you use an adapter) or software locking. In rare cases, you need to reset your phone to factory settings, but this is an extreme measure that requires a full backup.
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Regular backup of data to cloud services or a computer is the only way to guarantee the preservation of information in case of failures of the memory card.