How to transfer files from your phone to memory card in Xiaomi Redmi 9: all working methods

Why Redmi 9 can’t transfer files to the Internet SD-map?

Owners of Xiaomi Redmi 9 often face a problem: the phone’s memory runs out, and transferring data to the memory card does not work as expected, it’s all about MIUI policy and the limitations of Android 10/11, on which this model runs, the system by default saves photos, videos and even some applications in internal memory, even if you insert a microSD.

The key difficulty is in MIUI 12 There is no option "Use as internal memory" for SD-This Xiaomi solution is associated with performance optimization, but creates inconvenience for users with limited internal memory (32/64 GB in basic versions of Redmi 9). However, there are workarounds – and we’ll look at all the work options, including hidden settings and third-party tools.

It is important to understand: transfer applications and system files to SD-The map in Redmi 9 has limitations, but photos, videos, music and documents can be moved without loss of functionality.

Preparation: checking the memory card and phone settings

Before transferring files, make sure your microSD is compatible with Redmi 9 and formatted correctly. The phone supports cards up to 512 GB (officially up to 256 GB in the documentation, but tests show work with large volumes), the optimal class is UHS-I (U1/U3) or Class 10 for recording video in 4K.

To avoid mistakes:

• 🔍 Check the file system of the map: Redmi 9 works only with the FAT32 (up to 32 GB or exFAT (64 GB). NTFS unsupported!
• 📱 Insert the card into the hybrid slot SIM (second slot, combined with SIM-If two cards are used SIM, You have to choose, or the second. SIM, or SD-map.
• 🔄 Restart your phone after inserting the card – sometimes the system doesn’t recognize it right away.
• 🛠️ Check the card for errors via PC (in the disk properties, select "Error Check").

⚠️ Note: If the memory card has been used in another device (e.g., a camera or car recorder), format it directly in Redmi 9. → Warehouse → Map. SD → Format. It will delete all data, but it will avoid file system conflicts.

Method 1: Transfer files through the built-in file manager

The easiest method is to use the standard Files by Google or MIUI File Manager, which requires no additional software and works on all versions of MIUI for Redmi 9.

Step-by-step:

1. Open the Files app (the folder icon on the desktop).
2. Go to Categories → Images (or Videos, Audio depending on file type).
3. Press and hold your finger on the file, then select the rest (or tap Select All).
4. Click on the Move icon (arrow to folder) in the lower menu.
5. In the list of locations, select the SD Card, then the destination folder (for example, DCIM/Camera for photo).
6. Confirm the transfer button Move here.

Backup important data on the PC

Check the vacant space for SD-card (minimum 10% of the file size)

Close all applications that work with files (gallery, player)

Disable cloud sync (Google Photos, Mi Cloud)-->

To speed up the process, you can use the packet mode:

• 📂 Transfer files in folders rather than one at a time (e.g., the entire Camera or Downloads folder).
• 🔄 If the transfer is interrupted, check if the phone overheated (in Redmi 9 at temperatures above 45).°C system suspends operations with files).
• 📶 Turn off the mobile Internet during the transfer – this will speed up the process by 20-30%.

⚠️ Note: Do not remove the memory card while transferring files - this can lead to data loss or damage to the file system.If the phone freezes, wait for the operation to complete or perform a forced reboot (clip the power supply). + Volume up for 10 seconds).

Method 2: Automatically save new files to SD-map

To make sure that new photos, videos and downloads are immediately saved to the memory card, change the default settings in the applications. This is true for the Camera, Gallery and Browser.

For the Camera:

1. Open the Camera app.
2. Put it on the icon. ⚙️ (settings) in upper right corner.
3. Select a Retention Site → Map. SD.
4. Restart the camera to make the changes effective.

For downloads from the browser:

1. Open the browser (or Chrome).
2. Go to Settings → Downloads.
3. Indicate the path of conservation: /storage/XXXX-XXXX/DCIM/Downloads (where XXXX-XXXX — ID yours SD-map).

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If the list of locations is not displayed SD-The card, reconnect it or reboot the phone, sometimes it helps to clean the storage app cache. → Annexes → Application management → Warehouse → Clear the cache).

Limitations of the method:

• 🚫 Not all applications support the preservation of SD-card (for example, WhatsApp or Telegram by default save media in internal memory).
• 📁 Some system files (such as screenshots) will still be saved to the Pictures/Screenshots memory.

Method 3: Transfer applications to SD-map (with limitations)

Unlike files, applications are transferred to SD-The map in Redmi 9 is severely restricted. Xiaomi blocks this feature for most programs, but some games and utilities can be moved.

Instructions:

1. Go to Settings → Applications → Application Management.
2. Select an app from a list (such as a Subway Surfers game).
3. Slip it on the Warehouse.
4. If the option is available, the Change → SD card button will appear.
5. Confirm the transfer and wait until the completion (may take up to 5 minutes).

An alternative method for advanced users is the use of ADB-It allows you to bypass the limitations. MIUI, but requires a PC connection:

adb shell pm set-install-location 2

This command forces the system to install new applications on the SD-The default card, however:

• 🔧 It doesn’t work with all applications (especially those that require high performance).
• 🔄 After updating MIUI tuning may reset.

Method 4: Using a PC to transfer files

If there is too little space or too many files on the phone, it is more convenient to transfer them over the computer, which is also useful for backing up before resetting settings.

Step-by-step instructions for Windows:

1. Connect Redmi 9 to your PC via USB-cable (use the original cable for stable transmission).
2. On your phone, select File Transfer (MTP) mode in the connection notification.
3. Open This PC – the phone will appear as a removable drive (e.g. Redmi 9 (E:)).
4. Copy files from Internal Storage folders to SD Card (for example, drag and drop the DCIM or Downloads folder).
5. Wait for the copy to be completed and safely remove the device.

For macOS or Linux:

• 🍎 Install Android File Transfer (official software from Google).
• 🐧 Linux may require mounting the device via gvfs-mtp or jmtpfs.

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Transferring over a PC is the most reliable way for large amounts of data (such as 4K video or archives), and transfer speeds over USB 2.0 to Redmi 9 are ~30–40 MB/s, which is 2-3 times faster than Wi-Fi.

Advantages of the method:

• 📊 You can transfer files larger than 4 GB (limitation) FAT32 It does not work when copying via PC).
• 🔍 It is convenient to sort files before the perenosom (for example, divide photos by folder by year).
• 🛡️ Below is the risk of data loss in a crash (as opposed to transferring directly to your phone).

Method 5: Cloud as an intermediate stage (for backup)

If you don't have a PC or a card reader, you can use cloud services as a proxy, which is a good way to back up before you reset your phone or replace your memory card.

Instructions for Google Drive:

1. Install the Google Drive app from the Play Market.
2. Upload files to the cloud (select a folder and click + → Download).
3. After downloading, go to Settings → Offline files and save them to SD-map.

Alternative services:

• 🌥️ Mi Cloud (5GB free, integrated into the MIUI).
• 📦 Dropbox or Mega (comfortable for large files).
• ☁️ Yandex Disk (GB 10) when registering).

⚠️ Note: When using cloud services, keep in mind that downloading large files (such as videos) via the mobile Internet will consume a lot of traffic. Also check your sync settings in apps (for example, Google Photos can automatically delete files from your phone after uploading to the cloud).

Problem Solving: What to do if files are not transferred?

If there are errors when transferring files, use this diagnostic manual:

If the memory card is determined but the files are not portable, try:

1. Restart your phone in Safe Mode (clip Power, then hold Down until option appears) This will disable third-party apps that can block access to files.
2. Clear the cache of the Storage and Files applications in Settings → Apps.
3. Update. MIUI Up to the latest version (some builds corrected errors with the SD-map).

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If your phone says "SD card corrupted," don't format it right away. Try reading data through your PC using PhotoRec or Recuva, which can restore files even from damaged media.

FAQ: Frequent questions about file transfers to Redmi 9