How to safely transfer data from SD-Xiaomi smartphone cards: all working methods

Moving files from a microSD card to the internal memory of a Xiaomi smartphone is a task that users face when there is a lack of space on the map or a desire to speed up access to data. MIUI, where the transfer was limited to system settings, modern firmware (starting with the MIUI 12) offer several flexible options, from a standard file manager to use ADB-Teams for Advanced Users.

But not all methods are equally effective, such as moving applications from the SD-Xiaomi's internal memory cards are often blocked by the system due to Android's security policy. But photos, videos and documents can be moved without restrictions - the main thing is to know the nuances: from the file system format (FAT32 vs exFAT before the specifics of working with OTG-Adapters on new models like Xiaomi 14 or Redmi Note 13 Pro+.

In this article, we will discuss 5 proven ways to transfer data, including bypassing common errors like “No space” or “File is not supported.” And answer the questions: why some files are not copied, how to avoid data loss when retrieving a card, and what to do if the phone does not see a microSD after transfer.

1.Preparation: What to do before data transfer

Before you start copying files, make sure your SD-Xiaomi card and smartphone ready for operation, skipping these steps can lead to data loss or system failures.

First, check the file system format of the card:

• 📁 FAT32 — Compatible with all devices, but limited to files up to 4GB.
• 📁 ExFAT – supports files of any size, but may not read on older Xiaomi models (up to the current one) MIUI 10).
• 📁 NTFS — It is rarely used on memory cards, but some users format it to this standard for Windows.

To find out the format, insert the card into the PC and look at the disk properties in the explorer.

Second, make room for the internal memory of your smartphone. Even if you transfer files selectively, MIUI requires at least 10-15% free space for stable operation. You can check the occupied amount in Settings → About Phone → Memory.

⚠️ Attention: If you are using SD-The card is like internal memory (Adoptable Storage in older versions of Android), and it's not possible to transfer data using standard methods, in which case you have to format the card as a removable drive, which will lead to a complete loss of all data on it.

Finally, back up your important files, and you can do this by:

• 🔄 Copy data on a PC through a card reader.
• ☁️ Download to the cloud (Google Drive, Mi Cloud or Yandex Disk).
• 📱 Use the Xiaomi Backup app (available in the MIUI default).

Check the format SD-map (FAT32/exFAT)

Free up 10-15% of your phone’s internal memory

Create a backup of important files

Battery charge of at least 50% (in case of long-term copying)

Turn off battery optimization for file manager (Settings) → Battery → Optimization)-->

Method 2: Transfer through the standard MIUI file manager

The easiest method is to use the built-in Files by Xiaomi, which supports batch copying, previewing and even unpacking archives, and is relevant for MIUI 12-14:

1. Open the Files app (the folder icon on the desktop).
2. Go to the Device section → SD-map.
3. Select files or folders: 📂 To highlight several files, hold your finger on one of them, then mark the rest. 📁 To select the folder in its entirety, click on its name (not the icon!).

Copy

Cut out

Internal memory.

Downloads

DCIM

Insert

The speed of copying depends on the class. SD-map:

• 🐢 Class 4/6 — before 10 MB/s (slow for large files).
• 🚀 Class 10/UHS-I — 30-90 MB/s (optimum for Xiaomi).

The newer models (Xiaomi 13T, Redmi K60) support UHS-II, but the real speed is limited by the phone's controller.

⚠️ Note: If the copying error appears "File is too large", then your card is formatted in the form of a copy. FAT32. The solution is to reformat it to exFAT (but it will delete all data!).

💡

To speed up the transfer, connect the phone to charge. MIUI automatically limits the performance of the processor when the battery is low, which slows down copying.

3. Method 2: Use of OTG-card reader

If the file manager MIUI It works unstable (for example, it flies when copying large files), you can connect it SD-card to phone OTG-This method is especially useful for Xiaomi owners with a damaged memory card slot.

You'll need:

• 🔌 OTG-Adapter (Type-C or Micro-USB depending on the phone model).
• 📤 Card reader (can be used in the adapter or separate).

Connect the adapter to the phone, insert it into it. SD-the card, and it will appear in the files as an external drive (USB-The next step is the same as the first one: highlight the files. → copy it into internal memory.

Advantages of the method:

• ⚡ Faster than standard copying (bypassing restrictions) MIUI reading-speed SD).
• 🔄 You can connect two cards at once (for example, transfer data between them).
• 🛠️ It works even if the microSD slot on your phone is faulty.

The disadvantage - requires the purchase of an adapter (cost from 200 rubles).

Method 3: Transfer over a computer (the most reliable method)

If you need to transfer a lot of data (tens of gigabytes), you should use a PC or laptop, which minimizes the risk of failure and allows you to control the copying process.

Step-by-step:

1. Connect your phone to your PC through USB-cable (preferably original).
2. On the phone, select the data transfer mode: 📱 File transfer (MTP) — access to internal memory and SD-map. 🖥️ USB-accumulator (UMS) — outdated mode, not supported in the new Xiaomi.

This computer

PC

SD-map

Copy files from card to computer, then from computer to phone (or drag and drop between folders right away).

Advantages of the method:

• 🔍 The ability to check files for viruses before transfer (for example, through Kaspersky Total Security).
• 📊 Copy speed control (in Windows, displayed in the transfer window).
• 🔄 You can convert files on the fly (for example, change the format of the video through HandBrake).

⚠️ Note: If you connect Xiaomi to the PC does not appear SD-map, check: Is access to the card enabled in the phone settings: Settings → Memory. → SD-map → Settings (⚙️) → Access to data: Is the card used as internal memory (in which case it will not be visible on the PC) or is the driver updated? MTP on your computer (download from the Android site).

Through the MIUI file manager

With help. OTG-adapter

I'm connecting to the computer.

I use cloud services.

Another method-->

5. Method 4: Cloud Services (for backup)

If you don't just want to transfer files, but back them up with access from any device, cloud services are the right option. Xiaomi offers its own solution, Mi Cloud, but it has limitations:

• ☁️ 5 GB free (to increase the volume you need to pay).
• 📤 Maximum size of one file – 2 GB.
• 🔒 Data is stored on Xiaomi servers in China (may be a problem for sensitive information).

Alternative services:

• 📁 Google Drive – 15 GB free, Android integration.
• 📂 Yandex Disk – 10 GB free, high download speed in Russia.
• 🗄️ Mega – 20 GB free, data encryption.

How to transfer files through the cloud:

1. Install a service app (such as Google Drive) on your phone.
2. Download files from SD-Maps to the cloud (select) → Share. → Choose a service).
3. Download files from the cloud to your phone’s internal memory.

This method is slower than direct copying, but reliable for backup.

💡

Cloud services are convenient for transferring files between multiple devices, but are not suitable for large amounts of data (due to file size and Internet speed limitations).

6. Method 5: ADB-Teams for Advanced Users

If standard methods don’t work (e.g., MIUI blocks copying certain files), you can use ADB (Android Debug Bridge), which requires command line skills but gives you complete control over data transfer.

Instructions:

1. Enable USB Debugging on your phone: Settings → About Phone → MIUI Version (click 7 times) Settings → Additional → For Developers → Debugging on USB
2. Connect your phone to your PC and install ADB (download from Android site).
3. Open the command line (cmd) and enter: adb devices (should display the serial number of your Xiaomi).
4. Copy files from card to phone: adb pull /storage/XXXX-XXXX/SdCard/fileway C:\Temp\ adb push C:\Temp\file /storage/emulated/0/Download/ (substitute XXXX-XXXX real ID yours SD-The card can be found through adb shell ls. /storage).

Warnings:

• 🚫 Do not use adb for system files (risk of damage) MIUI).
• 🔧 Teams are sensitive to register and gaps.
• 📡 For large files (>1 GB is better to use adb sync.

7.Typical errors and their solutions

When transferring data from SD-Xiaomi cards are often encountered by users with errors. Let's analyze the most common and how to fix them:

If files are not opened or damaged after transfer, check their integrity:

• 🔍 Use Google Photos for photos (automatically restores metadata).
• 🎵 For music and video, try playing them through VLC Player (supports corrupted files).

8 Frequently Asked Questions