Combining phone memory and memory card on Xiaomi Redmi 9A: the full guide

Xiaomi Redmi 9A owners often face a shortage of internal memory, especially if the device is used to store photos, videos or heavy applications. One effective solution is to combine the internal drive with a microSD card, which allows you to expand the available space without buying a new smartphone. However, the procedure has nuances: not all cards are supported, and the wrong actions can lead to data loss.

In this article, we will discuss how to combine the memory of the phone and SD-maps 9A You'll learn about memory card requirements, step-by-step configuration through MIUI, alternative methods (including ADB), And also how to avoid common bugs, and let's talk about performance and compatibility, because when you combine some applications, the speed of some applications can change.

Requirements for a memory card for combination

Not every microSD is suitable for combining with internal memory Xiaomi Redmi 9A. The manufacturer imposes strict restrictions, ignoring which will lead to failures or inability to perform the procedure.

• 🔹 Speed class: minimum UHS-I (Class 10) or A1. Class Class Cards 4/6 unsupported.
• 🔹 Volume: from 8 GB to 256 GB. The optimal option is 32-128 GB (balance of price and performance).
• 🔹 Formatting: The map must be formatted into FAT32 exFAT (MIUI automatically provide the desired format).
• 🔹 Manufacturer: SanDisk, Samsung brands are recommended EVO, Kingston: Cheap no-name cards often cause errors.

Important: Redmi 9A does not support memory integration with cards previously used in other devices in Portable Storage mode. If the card has already been formatted as internal memory on another phone, it will have to be completely cleared.

⚠️ Warning: Once combined, the memory card will become unreadable on other devices (PCs, cameras) without full formatting!

Preparing the phone before combining memory

Before starting the procedure, several critical steps must be taken, and neglecting them can lead to data loss or system failures:

1. Back up all your phone data (photos, contacts, messages) through Settings → System → Backup or using Mi Cloud.
2. Charge the phone to at least 50%. Interrupting the process due to battery discharge is fraught with damage to the file system.
3. Remove unnecessary files from internal memory to free up at least 1-2 GB. This will speed up the process of combining.
4. Check the memory card for errors via PC (use the chkdsk utility in Windows).

If you already have important files on the card, copy them to your computer - they will be deleted after combining. Also make sure that the phone has the latest version of MIUI installed. To check for updates, go to Settings → About Phone → System Update.

⚠️ Note: If the phone has enabled data encryption (Settings) → Lockdown and protection → Encryption, memory consolidation will be impossible until this feature is disabled, and encryption will have to be removed, which will require a complete reset of the device!

Step-by-step: Memory integration via MIUI

The easiest way to combine your internal memory and SD-map - use built-in tools MIUI. Follow the instructions:

1. Insert the memory card into the Redmi 9A slot (only microSD, microSDHC, microSDXC are supported).
2. Open the Settings → Memory.
3. Tap your name on it. SD-maps, for example, "SD-map: 32 GB").
4. In the upper right corner, press three dots (⋮) and select Storage Settings.
5. Select Internal Memory (not Portable Storage!).
6. Confirm the formatting of the map – all data on it will be erased.
7. Wait until the process is complete (it can take 5-15 minutes).

After the reboot, the system will suggest moving data from internal memory to the combined storage, and it is recommended to agree to free up space, but some applications (such as WhatsApp or Telegram) may require manual cache transfer.

To make sure that the merger was successful, go to Settings. → Memory. Now you'll see a single storage unit where the volume is equal to the sum of the internal memory and SD-Cards (net of service files).

Transfer applications to the combined storage

Even after memory is combined, not all applications will automatically move to the memory. SD-To manually transfer programs:

1. Open Settings → Applications → Application Management.
2. Select the app you want (like Facebook or Google Maps).
3. Slip the Warehouse.
4. Click Change and select SD-Card (if the option is active).
5. Confirm the transfer. Some applications will require a reboot.

Note that not all programs support portability. System applications (Google Play Services, MIUI Launcher) and high-performance games (such as PUBG Mobile) will remain in internal memory, and transfer may slow down the application if the memory card has a low read/write speed.

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If the app is slow after transfer, try clearing its cache (Settings → Apps → [Name] → Clear the cache). If that doesn't work, transfer it back to internal memory.

Alternative method: Combining through ADB (for power users)

If the standard method does not work (for example, the button "Inner memory" is missing), you can use the device. ADB-This method requires connecting the phone to a PC and basic command line knowledge.

You'll need:

• 🖥️ Computer with Windows/macOS/Linux.
• 🔌 USB-cable (preferably original).
• 🛠️ Utility. ADB Tools (download from the official website of Android Developers).
• 📱 Included debugging by USB on the phone (Settings) → The phone. → Version. MIUI → 7 times tap to unlock Developer Settings, then turn on Debugging by USB).

Step-by-step:

1. Connect the phone to the PC and confirm the debugging permission.


2. Open the command prompt (Windows) or terminal (macOS/Linux) in the folder with ADB.




3. Enter a command to check the connection:




adb devices




(Serial number of your Redmi 9A should be displayed).




4. Enter the command to combine memory (replace disk:179,X with the current identifier of your card, which can be found through the command adb shell sm list-disks):




adb shell sm partition disk:179,X private




5. wait until the process is completed (the phone will restart).

Each device has a unique card ID (disk:179,X) that can cause data loss if you are not sure what you are doing, use the standard MIUI method.

⚠️ Attention: Use ADB-commands cancel Xiaomi warranty and may disrupt the stability of the system!

Common Problems and Their Solutions

When combining memory on Redmi 9A, users often encounter common errors, and here are the most common ones and ways to fix them:

• 🔄 "Failed to format the map: Check the card on another device. If the error repeats, the card is damaged. Try formatting it into a new device. FAT32 via PC with utility SD Formatter.
• ⚡ "Phone slows down after you combine": "Case low card speed. Return settings to the original (share memory) and buy a class card A2.
• 📱 "Apps don't install on map": Some programs have limitations.Try clearing the Google Play Market cache or installing APK manually.
• 🔌 "Phone doesn't see card after reboot: Remove and repaint card. If problem persists, check slot for dust or damage.

If the memory is still separate after the combination, reset (Settings → System → Reset), but note that this will delete all data from the phone. Also make sure that there are no bad sectors on the map – their presence can block the process.

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If the memory card is no longer defined after the combination, do not try to format it through the PC, this will lead to the loss of all data in the combined storage.

How to bring it all back: Memory separation

If the combined storage is unstable or you decide to return the original settings, follow the following steps:

1. Go to Settings. → Memory.
2. Slip it on the joint vault.
3. In the menu, select Format as portable (or "Share Memory").
4. Confirm the action. All data on the map will be deleted!
5. After formatting, remove the card and paste it again – it will now appear as a separate device.

Important: once disconnected, some of the apps on the map may stop working, they will have to be reinstalled, and check the internal memory for duplicate files, sometimes the system leaves "junk" after splitting.

If the phone is slower after disconnecting, clear the cache through Settings → Memory → Clean up or perform manual optimization using the Security app (built into MIUI).

FAQ: Answers to Frequent Questions