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

Xiaomi Redmi 9 owners often face a lack of internal memory, especially if the device is used to shoot videos in Full HD, Installing heavy gaming or storing a lot of photos, transferring data to a microSD card seems like an obvious solution, but in reality users face limitations. MIUI, For example, not everyone knows that Redmi 9 can not directly migrate installed applications to the Internet. SD-card without root rights, but you can easily move media files, documents and even cache of some programs.

This article covers all the current ways to transfer data, from standard MIUI 12/13/14 functions to circumventing restrictions using a PC or file manager. We will discuss why a phone may not see a memory card, how to format it correctly for Redmi 9, and what to do if files are not copied.

1.Preparation: Which Memory Card to Choose for Redmi 9

Before transferring data, make sure your memory card is compatible with the Xiaomi Redmi 9. The phone supports microSD up to 512 GB (officially up to 256 GB, but tests show that it works with large volumes).

• 🔹 Speed Class: Minimum Class 10 (UHS-I), videotape 4K It's going to slow down. It's better for games and apps. UHS-I U3 or A2.
• 🔹 Formatting: Redmi 9 only works with FAT32 (up to 32 GB) or exFAT (over 32 GB). NTFS unsupported!
• 🔹 Brand: avoid no-name cards - they often fake speed performance.SanDisk Ultra, Samsung are optimal EVO or Kingston Canvas.

If the card is new, you need to format it right on your phone.

1. Insert the card into the slot (under the SIM tray or into the hybrid slot if you use 2 SIM).
2. Go to Settings → Memory → Memory Map.
3. Click Format as internal (if you want to expand your phone’s memory) or Format as portable (if you use it as a removable drive).

⚠️ Note: Formatting as internal memory will encrypt the card for your Mi Account. Once extracted, the data will not be available on other devices!

2. Method 1: Transfer files through standard MIUI Explorer

The easiest method is to use the built-in Explorer (Files app) that allows you to move photos, videos, music and documents without any additional software.

1. Open the Files app (the folder icon on the home screen).
2. Go to the Internal Memory section and select the file folder (e.g. DCIM for photo or Download for downloads).
3. Press your finger on the file (or multiple files) before ticks appear.
4. Click More → Move (do not “copy”, otherwise the files will remain on both media).
5. Select a Memory Map and specify the target folder (for example, create a Photos folder).

Limitations of the method:

• 🚫 You cannot transfer installed applications (only their data, for example, game cache).
• 🚫 System files and folders (such as Android) are hidden and inaccessible to move.
• 🚫 Copy speed depends on the class of the card – on Class 4 transfer 10 GB photo will take ~20 minutes.

Method 2: Use of the card as an internal memory (Adoptable Storage)

If you format your card as internal memory, MIUI will automatically save new files (photos, videos, downloads) to it.

To enable this regime:

1. Put the card in the phone.
2. Go to Settings → Memory → Memory Map.
3. Press Three dots (⋮) → Memory settings → Formatting as an internal.
4. Confirm the action (all data on the map will be erased!).
5. After formatting, select Transfer Data to move existing files.

⚠️ Note: If you are selling a phone, be sure to transfer the data back to internal memory and format the card as portable, otherwise the new owner will get access to your files!

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

If the phone is buggy or too many files, it’s easier to connect Redmi 9 to your PC and transfer data through Windows Explorer or macOS Finder. This method is also useful if you need to copy hidden folders (for example, with application backups).

Step-by-step:

1. Connect your phone to your computer through USB-Cable (original or certified).
2. On your phone, select File Transfer (MTP) mode in the connection notification.
3. On PC, open This computer (Windows) or Finder (Mac) – the phone will appear as a removable drive.
4. Copy files from your phone’s folders (e.g., Internal Storage → DCIM) to a memory card (it will appear as a separate drive).

Advantages of the method:

• 🔹 High speed copying (especially when used) USB 3.0).
• 🔹 You can transfer system files (for example, backups Titanium Backup).
• 🔹 More reliable than wireless methods (no connection break risk).

💡

If your computer can’t see your phone, try another cable or port. USB. Also check if the debugging is included. USB In Settings → The phone. → Version. MIUI (Press 7 times, then return to the Additional Settings → For developers → Debugging by USB).

5. Method 4: Transfer applications to a memory card (with limitations)

Unlike the older versions of Android, MIUI 12+ Redmi 9 severely restricts the portability of applications to the SD-Officially, you can only transfer the map:

• 📱 Part of the application data (cache, downloads).
• 📱 Some games (e.g. Genshin Impact lets you choose the installation path).

To try to migrate the application:

1. Open Settings → Applications → Application Management.
2. Select the app you want (such as WhatsApp).
3. Click Warehouse → Change (if the option is active).
4. Select a Memory Card and confirm.

If the Change option is inactive, the application does not support the transfer, in which case only:

• 🔹 Root access (but this voids the warranty).
• 🔹 Installation of applications on the map through ADB (hard-to-do).
• 🔹 Using the card as internal memory (mode 3).

💡

Most modern applications (VK, Telegram, games block transfer to the SD-The only solution is to expand internal memory through Adoptable Storage.

Method 5: Automatically transfer photos and videos through camera settings

If you take photos/video often, you can set up automatic saving on the memory card.

1. Open the standard Camera app.
2. Press on. ⚙️ Settings → Memory. → Save it to the memory card.
3. Choose Always or Only if you have a memory deficit.

Limitations:

• 🔹 It only works for new files – old photos need to be manually transferred.
• 🔹 Some third-party cameras (like Google Camera) ignore this setting.

For third-party cameras (such as Open Camera), the save path changes in their own settings:

Open Camera → Settings → Folder to save → /storage/XXXX-XXXX/SD Card/DCIM

7. Frequent errors and their solutions

When you move data, Redmi 9 users have a common problem, and we're going to look at some of the most common ones.

If your phone is running a memory card error, try:

1. Remove the card and check it on another device.
2. Connect to the PC and execute the command chkdsk D: /f (where D: is the letter of the card disk).
3. If it doesn’t work, the card is faulty (replace it).

8.Alternative methods: cloud services and FTP

If physical transfer is not possible (for example, a broken card slot), you can use cloud services or FTP-server:

• 🔹 Google Drive/OneDrive: upload files to the cloud from your phone, then download to your PC and transfer to the map.
• 🔹 FTP through ES Conductor: Install ES File Explorer. FTP-server in the application settings. Connect to your phone from your PC over the local network and copy the files.

OTG-adapter

USB-OTG

Cons of these methods:

• 🔹 Slower than direct copying (depending on internet or Wi-Fi speed).
• 🔹 Risk of data loss in connection breakdown.

Use the card as an internal memory (mode 3).