How to transfer data from SD-Home Memory cards Xiaomi Redmi 9: 5 proven ways

Xiaomi Redmi 9 owners often face the need to make room for the new model. SD-It's a simple task to transfer data between the drives, or to save important files in a more secure place, the internal memory of the smartphone. MIUI, This article will help you avoid typical problems and choose the best method depending on the type of data and its volume.

Redmi 9 features microSD support of up to 512GB, but not all applications are able to work with external media correctly. For example, WhatsApp defaults to store media in internal memory, and Google Photos can duplicate files. We will analyze not only standard methods through Explorer, but also alternative methods using PC, ADB and third-party utilities, taking into account the nuances of the MIUI 12/13 firmware.

Preparation for transfer: what to check before copying

Before you start transferring, make sure that there is enough space on the internal drive. In Redmi 9 with a basic configuration of 32 GB of free space, often less than 10 GB is left - this is only enough for a few hundred photos. You can check the occupied volume in the Settings menu → About phone → Storage.

The second critical point is the format SD-If it's formatted as internal memory (Adoptable Storage in Android), it's pointless to transfer files, because the system already treats it as part of the main drive:

1. Open the Settings → Memory.
2. Tap the line. SD-map.
3. If you see the word "Portative media" -- the card is portable, and if you see "Inner memory," you'll have to format it beforehand (with loss of data!).

⚠️ Note: When formatting SD-maps as internal memory MIUI It encrypts her data, and once you extract the card, the files will be unavailable on other devices!

It is also worth considering:

• 📸 Photo and video format HEIF/HEVC (default MIUI) It takes up less space, but not all devices support it.
• 🎵 Music and documents are usually not attached to apps, so they are the easiest to move.
• 📱 Application data (caches, game savers) cannot be transferred - they are tied to internal memory.

2. Method 1: Transfer through a standard MIUI conductor

The easiest method is to use the built-in Explorer (Files from Xiaomi), which supports batch copying, but has a limit on the number of files allocated simultaneously (up to 500 pieces).

1. Open the Files app (the folder icon on the home screen).
2. Go to section. SD-map (usually displayed as a map) sdcard1 card-maker).
3. Press your finger on a file or folder to activate the selection mode. Mark the desired items.
4. Click on the three dots in the upper right corner and select Copy in...
5. Specify the target folder in internal memory (for example, Internal storage → DCIM for photo).
6. Confirm the copy.

If there are many files, the process can take a few minutes. At this time, do not run other applications - MIUI suspends background processes when there is a lack of RAM, which leads to a copy failure. Progress is displayed in the notification panel.

⚠️ Note: When copying folders with Cyrillic names (such as "My Photos"), errors may occur.

Advantages of the method:

• ✅ Does not require a connection to a PC or installing third-party applications.
• ✅ It saves the folder structure (if you copy it completely).
• ✅ Supports file preview before copying.

Disadvantages:

• ❌ Slow speed with large data volume (due to the limitations of eMMC 5.1 in Redmi 9).

Charging the phone > 30%|Background applications closed|Freely. > 1 GB of internal memory|Folder names checked (no Cyrillic)|Power saving mode is off.-->

3. Method 2: Use of a PC (through USB-cable)

If you have more than 10 GB of data, you can transfer it faster through your computer. USB-cable (preferably original, as cheap cables limit speed to the speed of the cables) USB 2.0) and 5-10 minutes of time:

1. Connect Redmi 9 to your PC via USB. In the phone notification curtain, select File Transfer (MTP) mode.
2. Open This Computer – Two devices should be displayed: Internal Memory (Redmi 9) and SD-map (SD Card or similar).
3. Copy files from SD-cards to any folder on the PC (for example, on the desktop).
4. Transfer data from the folder to the PC to the phone’s internal memory (in the Internal storage folder).

Copy speed via USB 3.0 (blue connector on PC) reaches 40-60 MB / s, which is 3-5 times faster than through Explorer.

• 🔌 Use the back. USB-System unit ports (they are usually more powerful than front ones).
• 📂 Copy files with archive (.zip) if there are many – this will reduce the time for transferring small files.
• 🚫 Do not remove the cable until the operation is complete (check the indicator in the notification area on Windows).

Important: When connected via USB, MIUI can block access to some system folders (such as Android/data). To see them, turn on the display of hidden files in the Windows Explorer settings.

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If the PC can't see SD-If you can get it out of your phone and put it in your card reader, sometimes the problem is the drivers. MTP For Xiaomi, update them through the official website.

Method 3: Transfer over ADB (for power users)

The method is for those familiar with the command line. ADB (Android Debug Bridge) allows you to copy files directly, bypassing the limitations of MIUI. The advantage is high speed and the ability to automate. The disadvantage requires configuration.

Steps:

1. Turn on Developer Mode on Redmi 9: Settings → About Phone → MIUI Version (shap 7 times)
2. Activate Debugging by USB in the Settings menu → Additional → For developers.
3. Connect your phone to your PC, install it. ADB-driver.
4. Open the command line (Win) + R → cmd) and execute: adb pull /storage/XXXX-XXXX/SdCard/ /path/on/pc adb push/path/on/pc /storage/emulated/0/ Replace. XXXX-XXXX real ID yours SD-maps (you can find the command adb shell ls) /storage).

This method is suitable for transferring system files or when standard methods do not work (for example, in damaged sectors on the system). SD-However, it requires caution:

⚠️ Attention: Adb teams pull/push The interruption of the process (for example, disconnecting the cable) can lead to data loss. --sync: adb pull --sync /path/to/large/file

An alternative to ADB is Minimal ADB and Fastboot, which makes it easier to work with teams. It can be downloaded from XDA Developers.

5. Method 4: Third-party file managers (Solid Explorer, FX File Explorer)

Standard MIUI Explorer is stripped down in functionality. Third-party managers like Solid Explorer or FX File Explorer offer:

• 🔍 Two-panel mode for easy copying.
• 📦 Archiving files before transfer.
• 🔄 Relocation function (not just copying).
• 🔒 Access to hidden folders (for example, Android/obb play-off).

Instructions for Solid Explorer:

1. Install the app from Google Play.
2. Provide access to memory in settings (Settings → Access to Storage).
3. Open the sidebar, select the SD-map.
4. Hold your finger on files/folders, click Cut (scissors) or Copy.
5. Go to internal storage and paste the files.

Warning: Some managers (e.g. ES Explorer) contain advertisements and may request unnecessary permissions.

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Third-party managers allow you to transfer files size >4GB on SD-file-system FAT32 (They automatically break files into pieces).

Method 5: Cloud Services (Google Drive, Mi Cloud) for Backup

If you need to not just migrate but back up your data, cloud services are the right fit. Xiaomi offers its own Mi Cloud (5GB for free), but it works unstable outside of China. Alternatively, Google Drive (15GB for free).

How to transfer via Google Drive:

1. Install the Google Drive app.
2. Press. + → Download, select files from SD-map.
3. Wait for the download to complete (speed depends on the Internet).
4. Download files back to internal memory through the same app.

Cons of the method:

• ❌ Long loading on slow internet (for example, at 10 Mbps, a 1 GB file is loaded) ~15 minutes).
• ❌ File size limit: 750MB for free Google accounts.
• ❌ Data leakage risk (if files are confidential, it is better to use local copying).

To automate photo backup, set up Google Photos: Settings → Backup and Sync → Enable.

7. Frequent errors and their solutions

When you move data, Redmi 9 users have a typical problem, and here's how to solve it:

If the files are missing after transfer:

1. Check the.trash folder in internal memory (removed files are temporarily moved to it).
2. Use the DiskDigger recovery utility (available on Google Play).

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To avoid data loss, back up your PC or cloud before transferring, a free utility called SyncToy (Windows) or rsync (Linux/macOS) is suitable.

FAQ: Answers to Frequent Questions