How do you do it? SD-Main memory card on Xiaomi Redmi 7A: full-length guide

Xiaomi Redmi 7A owners often face a lack of internal memory — especially if the phone is used to install heavy apps, shoot high-resolution videos or store a large number of photos. One solution to the problem is to transfer some of the data to a microSD card, turning it into an extension of main memory. However, this process has its own peculiarities: not all cards are suitable, and the wrong actions can lead to data loss or slow down the phone.

In this article, we will discuss all the ways of using SD-The main storage on Redmi 7A — From standard formatting through settings to alternative methods using ADB. You will learn which memory cards are better to choose, how to avoid errors when transferring data and what to do if the phone does not see. SD And also why this is not always a viable method, and why it's best to consider other options for extending memory.

Before you start, make sure your Xiaomi Redmi is available. 7A It works on the current version MIUI. Some features may vary depending on the firmware, and check if your model supports Adoptable Storage, a technology that allows you to use the software. SD-It's a card as part of the internal memory. 7A This function is available, but with limitations.

1. Which one? SD-The cards are suitable for use as primary memory.

Not every microSD is suitable for turning into an extension of internal memory. Xiaomi Redmi 7A supports cards format microSD, microSDHC, microSDXC up to 256 GB, but for stable operation in Adoptable Storage mode is important not only capacity, but also class speed.

Minimum card requirements:

• 🔹 Speed class: not lower UHS-I (Class 10) Optimal — A1 or A2 (Application-specific maps marked A2 Provide higher speed of random read/write, which is critical for the operation of applications.
• 🔹 Capacity: 16GB (but 64–128GB is recommended for a noticeable memory gain) Cards less than 16GB may not be formatted as internal memory.
• 🔹 Manufacturer: Give preference to proven brands — SanDisk, Samsung, Kingston, Toshiba. Cheap unnamed cards often have understated real-world characteristics.

⚠️ Warning: If you use a Class 4 or Class 6 card, after formatting as internal memory, your phone may start to slow down, which is due to low write speeds, which will cause applications to open or freeze for a long time.

Before buying, check the card for authenticity with utilities like H2testw (for Windows) or SD Insight (Android). Fake cards often have oversized and low speed, making them unusable as primary memory.

Preparation of the telephone and SD-maps before formatting

Before you do SD-card with primary memory, follow a few mandatory steps to avoid data loss and disruptions in the work of Redmi 7A.

Step 1. Create a backup of the data

• 📱 Keep in touch, SMS and log of calls through Settings → System and device → Backup.
• 🖼️ Transfer photos and videos to your computer or to the cloud (Google Photos, Mi Cloud).
• 🎮 Export game saves (if they are important) with apps like Helium.

Step 2. Check it out. SD-misscard

Connect the card to the phone and check:

1. Open the Settings → Memory.
2. Press yours. SD-map → Settings (⚙️) → Check for errors.
3. If you find corrupted files, format the card in FAT32 via your computer.

Step 3: Free Your Inner Memory

Once the SD is formatted as internal memory, all data will be erased and some system files will be moved to the card, making sure that the phone has enough space for this process (at least 1-2 GB is free).

Backup important data|Check the map for errors|Release. ≥1 GB of internal memory|Charge the phone. ≥50%|Connect to stable Wi-Fi (for downloading updates after formatting)-->

3. Step-by-step instruction: formatting SD as internal memory

Now let's get to the main process. 7A There are two ways to do this. SD-Main memory card: through standard settings MIUI and with help ADB (We'll look at both options.

Method 1: Using phone settings (a simple method)

1. Put it in. SD-Card to phone and wait for it to be found.
2. Open the Settings → Memory.
3. Press yours. SD-map → Settings (⚙️) → Formatting as an internal.
4. Read the warning that all data will be erased and confirm the action.
5. Wait for the formatting to be completed (it can take 5-15 minutes).
6. After the phone reboots SD-The card will be displayed as part of the internal memory.

Method 2: ADB (for experienced users)

This method gives you more control over the process and can help if the standard formatting doesn't work, so you'll need a computer with ADB drivers installed and USB debugging enabled on your phone.

Algorithm of action:

1. Turn on Developer Mode on your phone: Settings → About Phone → MIUI version (click 7 times).
2. Activate USB Debugging in Settings → Additional → For developers.
3. Connect your phone to your computer and open the command prompt (Windows) or terminal (macOS/Linux).
4. Enter the command: adb shell sm list-disks Remember the disk ID (e.g., disk:179.64).
5. Format the card as internal memory with the command: adb shell sm partition disk:179.64 private (replace 179.64 with your ID).
6. Wait for the process to be completed and restart the phone.

⚠️ Note: If, after formatting, ADB phone stopped seeing SD-map, try to disable and reconnect it or reset settings through Settings → System system → Resetting. In rare cases, re-formatting may be required.

💡

If, after formatting, applications are not installed on SD, Check the default settings in Settings → Memory. → The default location is saved "SD-map.

4. How to transfer applications and data to SD-map

Once the SD is formatted as internal memory, Xiaomi Redmi 7A will automatically offer to move some of the data, but not all applications can be moved, depending on their support for Adoptable Storage, let's figure out how to manually manage this process.

Transfer applications through settings:

1. Open Settings → Applications → Application Management.
2. Select the application you want to transfer.
3. Press Warehouse. → Change. → SD-map.
4. Confirm the transfer and wait until it is completed.

Limitations on transfer:

• 🚫 Not all applications support portability, for example, system utilities (Settings, Phone) remain in internal memory.
• 🎮 Games with large cash (for example, PUBG Mobile, Genshin Impact may not work properly SD.
• 🔄 After the transfer, some applications will run slower – this is normal for class cards. A1.

File transfer (photo, video, music):

For multimedia files, it is easier to use the file manager:

1. Open Explorer (or Files by Google)
2. Select the files you want to transfer.
3. Press Move Move Move. → SD-map → Select a folder.

⚠️ Attention: If you delete SD-The card will stop working until the card is inserted back, and it is not recommended to remove the card without first Safe Retrieval in the memory settings.

Possible problems and solutions

Even with the right formatting, Redmi 7A users may encounter errors, and let’s look at the most common ones and how to fix them.

If none of the methods worked, try resetting your phone to factory settings (don't forget to back up!) In extreme cases, the card can be returned to its original state via a computer using the SD Formatter utility.

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If, after formatting, SD As the internal memory of the phone has become slower, return the card to portable storage mode. → Memory. → SD-map → Format it as a portable, all data will be deleted, but performance will recover.

6.Alternative ways to expand memory on Redmi 7A

Use of the SD-But the main memory is not the only way to deal with space shortages. Let's look at alternatives that might be more effective depending on your tasks.

1. Cloud storage

• 🌥️ Google Drive, Mi Cloud, Yandex Drive – Allows you to automatically sync photos, videos and documents.
• 📁 For music and movies, Telegram is suitable (save files in "Favorites").

2. Manual file transfer

If you don’t want to format SD as internal memory, you can simply save new files to the card:

• 📸 In camera settings (Camera settings) → Select the place of preservation SD-map.
• 🎵 For downloads from the browser, specify the path to SD In Chrome or Mi Browser settings.

3.Use of OTG-accumulator

If you have a lot of large files (for example, movies in high resolution), you can connect the USB drive through the OTG-adapter. 7A supportive OTG, but a third-party player may be required to view the video (e.g, VLC).

4. Optimization of internal memory

• 🧹 Remove the app cache in Settings → Memory. → Clear the cache.
• 🗑️ Remove unnecessary APK-files from the Download folder.
• 🎮 Use the Lite version for games (for example, PUBG Mobile Lite).

⚠️ Note: If you often shoot videos in the 1080p or play hard games, SD-map (even class) A2) It might not be able to handle the load, and in this case, it's best to consider buying a phone with a lot of internal memory or using cloud services to store media files.

7. Myths and Truths About Using SD as Main Memory

The topic of transfer of applications to SD-There are many myths in the map, and we'll figure out what's true and what's not.

Myth 1: "SD-The internal memory is as fast as the internal memory"

❌ Not even class cards. A2 Fail to perform in the speed of the built-in memory eMMC (which is used in Redmi). 7A). The difference is particularly noticeable when running heavy-duty applications or multitasking.

Myth 2: “All applications can be ported to SD”

❌ System applications and some games (such as anti-cheat games) don't support portability, and some of the data will still remain in internal memory.

Myth 3: “Once SD is formatted as internal memory, it cannot be removed.”

⚠️ Part of the truth, you can extract the map, but you have to get it before you do:

1. Transfer all critical applications back to internal memory.
2. In the memory settings, select Safe Extract.

If you just take out the card, the applications on it will stop working, and the system can give errors.

Myth 4: “Forming SD as internal memory spoils the card”

⚠️ Depends on the card. Cheap cards without support. A1/A2 They actually wear out faster because of the constant read/write operations.

Important: Once the SD is formatted as internal memory, it will not be read on other devices (computer, other phone) without formatting beforehand. All data will be encrypted for a specific Xiaomi Redmi 7A.

FAQ: Frequent questions about using SD as primary memory