How to combine memory card with phone memory Xiaomi Redmi 8A

Owners of budget smartphones like the Xiaomi Redmi 8A often face a lack of built-in storage. Despite the availability of a microSD slot, the standard Android system does not allow it to be used simply as an extension of internal memory. Conventional formatting a card as a portable medium solves the problem of storing photos and music, but not applications.

There's a proven method to get around this limitation and force file systems to be merged, a process that requires careful and rigorous steps, because it involves working with system commands.

The result will be more space for installing programs and games, but it is worth noting that the speed of the microSD card is lower than that of the built-in one. NAND-Memory, which may have a slight effect on system performance.Be sure to charge at least 50 times the battery before you start%.

Preparation of equipment and software

To successfully perform the procedure, you will need not only the Redmi smartphone itself. 8A, But also a high-quality computer running Windows or Linux, and the key element is the original or certified computer. USB-A cable that can transmit data, not just charge the device, and cheap cables often cause connection breakdowns during critical operations.

You need to install ADB drivers on your computer, which is a standard tool from Google that allows your PC to interact with Android at a deep level. Without activating the USB debugging mode in the developer menu, your smartphone will not be visible to the command line.

It is also critical to choose the right memory card. In internal memory mode, you need fast read and write speeds. It is recommended to use Class 10, UHS-I or higher cards from proven brands like SanDisk or Samsung. Using slow cards will lead to strong interface lags.

• 📱 Xiaomi Redmi Smartphone 8A plug-in USB.
• 💻 Computer with drivers installed ADB.
• 🔌 Reliable. USB-data-line.
• 💾 MicroSD memory card with a volume of 16 GB (recommended) 32-64 GB).

⚠️ Warning: All data on the memory card will be destroyed. Copy important photos and documents to your computer or cloud storage in advance.

Check the integrity of the memory card before you start working, and if there are physical damages or logical errors on it, the process may fail, and the card itself may become unreadable.

Setting up a smartphone and activating debugging

The first step is to enable the hidden developer menu on your device, which is hidden from the eyes of the average user by default to prevent accidental changes in system settings. You need to go to Settings → About phone and quickly click 7 times on the MIUI version.

Once you have a “You’ve become a developer” message, you can move to advanced settings. The path to the desired menu is usually in Settings → Advanced Settings → Developer. In some versions of MIUI, this item may simply be called “Additional”.

Inside the developer menu, find the USB Debugging Switch and activate it. The system will alert you to potential risks — confirm the action. It is also recommended to enable the option “Debug over USB (security settings)” if available to allow emulation of computer clicks.

⚠️ Warning: Do not connect your phone to other people's computers with debugging enabled USB. This gives you full access to the device’s file system.

Connect your smartphone to your computer with a cable. You'll see a request on your phone for debugging permission from that computer. Make sure you tick "Always allow from this computer" and click "OK."

Now check the connection. Open the command prompt (cmd) on your computer in the ADB folder and type in the adb device command. If you see the device serial number and device status, the connection is correct.

Formatting a map through the ADB command line

The most important step is to split the memory card into two parts, which is not possible with standard MIUI, so we use console commands, open the ADB terminal on your computer and type in the command to enter the shell of your smartphone: adb shell.

Once you successfully log in to Android (a $ or # character will appear), you need to get superuser rights. Enter the su command. On the phone screen, you will see a request to provide root access for ADB Shell - click "Allow".

Now you need to know the exact name of your memory card in the system. Enter the command ls /dev/block/mmcblk*. Usually the internal memory is denoted as mmcblk0, and the memory card is denoted as mmcblk1. Be extremely careful: working with the wrong device can lead to loss of data on the internal memory.

sm partition disk:179,64 private

The command above is an example where 179.64 is the card ID. You need to substitute your values that you learned in the previous step. The sm partition command will create the necessary partitions and format the card into an ext4 file system that works as internal memory.

It's important to understand that the formatting process can take a few minutes, so don't turn off the cable or turn off the phone, and if it's successful, the system will notify you that the card is formatted and ready to use.

Data transfer and application configuration

Once formatted successfully, the memory card will become part of the phone's internal memory, but the system doesn't always automatically start using it for new applications. You need to manually set storage priorities.

Go to Settings → Memory. Here you will see a combined volume or a separate partition marked as internal memory. Click on it and select the data port option. The system will prompt you to move photos, music and some system files to a new partition.

To port installed applications, go to Settings → Apps → All apps. Select the desired application (for example, heavy play or social network). If the application supports portability, the Move or Change button will be active. Select the memory card as the target storage.

Not all applications can be moved; developers can prohibit installation of their programs on external drives for security or stability reasons, in which case the transfer button will be inactive or absent.

• 📸 Photos and videos can be transferred through the Gallery or the Explorer.
• 🎵 Music files are better moved through the built-in player.
• 📱 Applications are transferred individually through the settings menu.
• ⚙️ System caches are often moved automatically.

Use a file manager like MI File Manager or Total Commander to manually sort large files. Move the downloads and documents folders to the map to free up precious space in the system partition.

Possible problems and ways to solve them

Errors can occur when combining memory, most often users experience a cyclical phone reboot or a system failure to load the desktop, which can be caused by a slow memory card speed or file system damage.

If the phone stops turning on, try booting into Recovery mode. For the Redmi 8A, you need to press the power button and increase the volume. In the recovery menu, you can try doing Wipe Data, but this will remove all the information from the phone.

Another common problem is slow interfaces, which happens when the memory card has a low random read speed (IOPS), which means that the system will take a long time to open the applications installed on the card.

In some cases, re-formatting the card through a computer using the SD Formatter program helps before re-attempting to merge via ADB. This clears the drive's service areas.

Advantages and disadvantages of the method

Using a memory card as internal memory has its pros and cons. On the one hand, you get the ability to install more applications, which is critical for models with 32 GB of internal memory, on the other hand, you risk the stability of the device.

The main disadvantage is that the card is linked to a particular phone, and once formatted in internal memory, the card is encrypted, so you can't just insert it into another phone or computer and read the data, and you have to re-format it to use it on another device.

Also worth considering is the wear and tear of the memory card: the constant recording and reading of data that characterizes the operation of the system and applications quickly wears out the microSD resource. Quality cards last longer, but the risk of failure is still higher than that of internal memory.

⚠️ Attention: If the memory card fails, the applications installed on it will stop working, and their data may be lost.

However, for the Xiaomi Redmi 8A, it is often the only way to comfortably enjoy today's heavy-duty apps.The balance between convenience and risk is determined by each user himself.

💡

Use memory cards of the series "High Endurance" or "Industrial", they are designed for permanent recording of data and will last longer than usual.

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Memory integration expands the capabilities of the smartphone, but requires the use of a high-quality memory card and readiness for possible failures in the system.

Alternative ways to expand memory

If ADB seems too complicated or risky, there are safer, though less effective, ways to use the memory card as standard, by setting the camera and messengers to store data on it.

Many apps, such as Telegram, WhatsApp and YouTube, allow you to choose a path in your internal settings to save cache and downloaded files. By redirecting these threads to a microSD card, you will free up a significant amount of internal memory without risk to the system.

You can also use cloud storage, and services like Google Photos or Yandex.Disk can automatically upload media files to the Internet and delete them from the device, freeing up space, which requires a constant connection to the Internet, but ensures that data is safe.

For advanced users, it is possible to install customized recavators (such as TWRP) and create scripts that automatically transfer Android/data folders to the map. However, on newer versions of MIUI, this requires unlocking the bootloader, which can lead to a loss of warranty.