Owners of Xiaomi and Redmi smartphones often face a situation where internal storage is full, and the SD card, on the contrary, has free space. Android system by default saves photos, videos and app cache in internal memory, which leads to a slowdown in the device. Moving files back to the built-in drive is an effective way to optimize the performance of the gadget and make room for new updates.
The data transfer procedure does not require a connection to a computer and is performed directly through a standard File Manager Explorer. However, it is important to understand the difference between simple copying and full porting, since it depends on the availability of your documents after the operation is completed. In this article, we will discuss in detail all the nuances of working with the MIUI file system.
Preparing the device to work with the file system
Before you start taking action, you need to make sure that the memory card is correctly defined by the system. Often users insert the drive, but forget to format it for the needs of the smartphone. To check, go to Settings → About Phone → Storage. If the system suggests formatting the card, do so by saving important data on the PC beforehand.
Note formatting. For modern versions of Android and MIUI or HyperOS shells, the best choice is the exFAT or FAT32 file system. NTFS is often not readable by standard Android tools without root rights or installing special drivers. If your card is formatted in NTFS, your phone can see it, but won't let you write data to it or transfer files inside.
Also worth checking is the state of the drive itself. Damaged sectors can cause data loss during the copying process. Xiaomi's built-in diagnostics allows you to quickly check the status of the drive. If you plan to carry large amounts of data (for example, more than 10 GB), make sure that the battery is at least 30-40%.
- 📱 Make sure that SD The card is inserted correctly and displayed in the status bar.
- 💾 Check the space in the phone’s internal memory before transferring.
- 🔋 Charge the device to at least 30% to avoid sudden shutdown.
- 📂 Backup your critical files to the cloud.
⚠️ Attention: If yours SD The card was previously used in another device (camera, navigator), be sure to format it in the phone, this will prevent file system conflicts and write errors.
Use of the standard MIUI Conductor
The easiest and most reliable way to migrate data is to use the built-in Explorer app, which is pre-installed on all Xiaomi and Redmi smartphones, and has a user-friendly interface. Open the app and you'll see two main sections: file categories and a storage overview. You need a section"SD-map"USB-accumulator".
Navigate the folders through taps on the screen. Find the folder that contains the files you want. Most often it's DCIM for photos, Download for downloads or Music for audio. Select the files you need with a long press. In the menu that appears, select the option "Copy" or "Slice." The difference is that "Sliceal" will delete files from the card after transfer, and "Copy" will leave a duplicate.
Once you select an action, click the "Menu" button (three dots or bars) and select "Insert." The system will suggest selecting destination memory. Select "Internal drive" or a specific folder inside it, such as Internal storage/Download. The process will go automatically, and you will see the progress bar. The speed depends on the speed class of your memory card.
☑️ Transfer algorithm through the conductor
It is worth noting that when transferring a large number of small files, the process can take considerable time.
Transfer through the menu Storage settings
An alternative method that is often overlooked is system settings, which is convenient because it allows you to estimate the total amount of space you occupy and transfer data more consciously. Go to Settings → About Phone → Storage. Here you will see a visualization of the occupied space.
Some versions of MIUI firmware have a function to clean or transfer data directly from this menu. Click on Files or Other to see the distribution of data. If the memory card is defined as the primary storage for media (which happens when you set up the default), you can change priority here.
But the system menu is more often used for analysis than for file management. If you need to migrate specific folders, the Explorer method described above will be more effective. But to check what exactly takes up space, the settings section is indispensable. MIUI/debug_log It's grown to a few gigabytes.
| Type of data | Default location | Recommended seat | Impact on speed |
|---|---|---|---|
| Photos and videos | DCIM / Camera | Internal memory. | High (fast access in the gallery) |
| Music. | Music | SD card | Low (buffering hides the difference) |
| Documents | Download / Docs | Internal memory. | Average (depending on file size) |
| Cash messengers | Android/data | Internal memory. | Critical (brakes at low speed) |
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Use File Search in Explorer if you can't find the folder you want. Enter a file extension like.pdf or.mp4 to see all documents of this type on all drives.
Working with Multimedia Files and Gallery
The bulk of data on smartphones is taken up by photos and videos. The Xiaomi gallery can work with both drives, but scanning the SD card can take time. After transferring files to internal memory, the gallery may not immediately see changes.
To speed up the process, you can clear the cache of the Gallery app. Go to Settings → Apps → All Apps → Gallery → Clear → Clear the cache. This will not delete your photos, but will cause the application to re-index media files in internal memory. After that, the thumbnails should display correctly.
If you’re using sync with Xiaomi Cloud or Google Photos, moving files to internal memory can trigger a re-upload to the cloud if the sync is set up for internal storage only.
If your SD card has a low speed class (such as Class 4 or 6), watching such videos directly from the card can cause twitching.
Transfer of applications and their data
Apps in Android 10, 11, 12 and later have changed dramatically. Google has limited the ability to port applications to the Internet. SD Now, you can move a lot of people, because of security and stability. APK-file.
You can check the portability through the application menu. Go to Settings → Annexes → All applications, select the desired application and find the item "Memory Use". If the button "Move to" SD-The card is active (not grey), you're lucky, most often it's for cache games or simple utilities.
However, even if the application is moved, some of its data may remain in internal memory. System applications and Google services cannot be transferred categorically - this will lead to unstable work of Xiaomi Redmi. If the transfer button is inactive, third-party programs like App2SD can help, but they require complex settings through ADB.
⚠️ Warning: Do not force your system or bank applications to be moved through third-party software, which can disrupt security and block important smartphone functions.
Cleaning up system debris after transfer
Once you have moved the data from the SD card to the phone’s memory, the card may have hidden files or remnants of deleted programs, it is recommended to perform a complete cleanup. The Security app (green icon with lightning) has a built-in cleaner.
Run the scan. It'll find residual files, cache and unused packets. Pay special attention to the.Trash or Recycle Bin folder in the gallery and file manager. The files there take up space, but they're not visible in normal viewing. Deleting them will free up a few more gigabytes.
Also worth checking is the Android/obb and Android/data folder, sometimes after transferring games, there are empty folders from remote applications, and only delete them if you are sure that the relevant games are no longer needed or have already been moved.
What if the phone doesn’t see the files after the transfer?
Common mistakes and ways to solve them
During the transfer process, users often encounter an error called "Not enough space", even if there is a space available, because the file system needs a buffer for temporary operations. 1-2 GB before large-scale transfer.
Another common problem is a read/write error, which occurs if the SD card is physically worn out or damaged. If the error is repeated on different files, try checking the card on your computer using the chkdsk utility or simply replace the drive.
Remember that the speed of writing to the internal memory of modern Xiaomi (UFS 2.1/2.2/3.1) is much higher than most microSD cards.
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Transferring data from an SD card to internal memory is not just freeing up space, but also a way to extend the life of the battery and speed up the launch of applications, since internal memory is more energy efficient and faster.