How do you do it? SD-Main memory card on Xiaomi Redmi 4A: full-length guide

Xiaomi Redmi 4A It's still a popular budget smartphone, but its main drawback is just 16 GB of internal memory, and with the active use of instant messengers, social networks and games, this is not long enough. SD-map, but here users are waiting for pitfalls: not all maps are suitable, and the standard settings MIUI They limit the functionality. In this article, we'll look at all the working ways to do this. SD-Main memory card on Redmi 4A — From regular tools to root access methods.

It is important to understand that a full replacement of internal memory with external memory is possible only with the remarking of the card (Adoptable Storage), but MIUI It blocks this function by default. We'll look at workarounds, including ADB-You'll also learn which classes of commands, modified firmware, and alternative methods of porting applications. SD-The cards guarantee stable operation, and which will lead to brakes.

Why on Redmi? 4A you can't just do it SD-card

Unlike smartphones on pure Android, Xiaomi in MIUI firmware deliberately limits the Adoptable Storage feature.

• 🔹 Productivity: Cheap SD-Cards (especially Class Class Class Classes) 4/6) run slower than the built-in eMMC memory, which leads to lags.
• 🔹 Security: MIUI encrypts user data, and transferring them to a removable medium increases the risk of leakage.
• 🔹 Compatibility: Not all applications work correctly with external memory (e.g., cache games) /Android/obb).

But you can get around the limitations. Below are all the methods available, from simple to complex.

Preparation: what kind SD-map to choose for Redmi 4A

The wrong memory card is the main cause of brakes and errors. For the Redmi 4A, three parameters are critical:

1. Speed class: minimum Class 10 (UHS-I U1), optimally UHS-I U3 or A1/A2 (for applications).
2. Volume: from 32 GB (cards less than 16 GB MIUI will not offer formatting as internal).
3. Manufacturer: reliable brands - SanDisk Ultra, Samsung EVO, Kingston Canvas. Avoid no-name cards!

Critical error: Class 4/6 cards will cause the system to freeze when installing applications on SD. Check the card for authenticity with H2testw before buying - counterfeits often have an underrated speed.

⚠️ Note: If you are planning to use SD-The card is like an internal memory, and all the data on it will be deleted when formatted!

Method 1: Transfer of data to SD rootless (staffless) MIUI)

The safest but most limited way, it only allows you to transfer some of the data.

• 📁 Photos, videos, music.
• 🎮 Some games (cash in) /Android/obb).
• 📱 Application files (only if they support external memory).

Instructions:

1. Put it in. SD-slot-card SIM or a separate slot, depending on the modification of Redmi 4A).
2. Go to Settings. → Memory.
3. Tap it on. SD-map → Settings → Internal memory.
4. Confirm the formatting (all data will be erased!).
5. After rebooting to Settings → Applications, a port option will appear for supported programs.

Insert SD-card (Class 10 or higher)

Backup important files from the card

Charge your phone at least 50%

Disable antivirus (can block formatting)-->

Limitations of the method:

• 🚫 Not all apps support portability (e.g. WhatsApp, Telegram).
• 🚫 System updates and cache of some games will remain in internal memory.
• 🚫 Speed of application with SD below.

💡

If you don’t have an option called “Internal Memory” in your settings, upgrade your MIUI to the latest version or use the ADB method (see below).

Method 2: Forced formatting of SD as internal memory via ADB

This is a way to bypass the limitations of MIUI, but requires a computer and USB debugging, suitable for power users.

What you need:

• 🖥️ Computer with Windows/Linux/macOS.
• 🔌 Cable USB (original, undamaged).
• 📦 Utilities: ADB Fastboot (download from the official website).

Step-by-step:

1. Turn on your phone: Settings → About Phone → MIUI Version (tap 7 times to become a developer) Settings → Additional → For Developers → Debugging over USB (enable)
2. Connect the phone to the PC and confirm the debugging permission.
3. Open the command prompt (Windows) or terminal (Linux/macOS) in the folder with adb.exe.
4. Enter the command: adb shell sm list-disks Output will be similar to disk:179,XX (remember XX).
5. Format the map as an internal one: adb shell sm partition disk:179,XX private
6. Reboot the phone.

After the reboot. SD-The card will be part of the internal memory:

• 🔄 It can't be retrieved without losing data.
• 📉 The speed of the system may drop (depending on the class of the card).
• 🔧 Some applications (such as banking) will not work with external memory.

⚠️ Note: If after the sm partition command, the error java.lang.IllegalArgumentException appears, then your card is not supported by the system. FAT32).

Method 3: Transfer applications to SD using root rights

If the previous methods didn't work, you get root rights, which gives you complete control over the system, but it takes away the warranty and can lead to a phone blink.

What you need for root:

• 📱 Unlocked bootloader (Bootloader).
• 🔓 Established TWRP Recovery.
• 📦 Magisk firmware for root management.

Instructions:

1. Unlock the bootloader through the official Xiaomi tool (you will have to wait 7-14 days).
2. Install TWRP for Redmi 4A (the version must match the model: rolex for global firmware).
3. Run Magisk through TWRP.
4. Install an App2SD or Link2SD app from Play Market.
5. In the application settings, select the option to Move to SD or Create a link.

Advantages of the method:

• ✅ Transfer of any applications, including system.
• ✅ Possibility of transferring the game cache (/Android/obb).
• ✅ Control of memory sections.

Risks:

• ❌ Loss of guarantee.
• ❌ Possible errors in the update MIUI.
• ❌ Risk of a breeze with incorrect firmware.

Frequent mistakes and their solutions

When working with SD-map 4A And the problem is that users are facing typical problems:

Additional advice:

• 🔄 If the application is transferred to SD Stop working, clear its cache in Settings → Annexes.
• 📱 For high-cache games (PUBG, Call of Duty: Use FolderMount (requires root).
• 🔧 Check the health of the card regularly SD Insight – worn-out cards slow down the system.

💡

If after all the manipulations the phone began to work slower, return SD-card in portable storage mode (via Settings) → Memory and use it only for media files.

Alternative ways to free up memory on Redmi 4A

If porting to SD didn’t help or doesn’t work, try these methods:

• 🧹 Cache cleanup: Settings → Memory. → Clear the cache (releases until) 1-3 GB).
• 🗑️ Remove Unnecessary Files: Use Files by Google to Find Duplicates and Large Files.
• ☁️ Cloud Storage: Move Photos and Videos to Google Photos or Mi Cloud (gives 5GB for free).
• 🔄 Lite versions of apps: replace Facebook with Facebook Lite, Messenger with Messenger Lite.
• 📱 Reset to factory settings: extreme method, but returns "clean" system (make backup!).

To automate the cleanup, install SD Maid (requires root) or CCleaner. These applications find and delete temporary files, remnants of uninstalled programs, and empty folders.

⚠️ Warning: Do not use cleaners like Clean Master, which often delete important system files and show false virus warnings.

FAQ: Answers to Frequent Questions