How to combine memory Xiaomi Redmi 7A: 3 working methods + risks

Xiaomi Redmi 7A is a budget smartphone with 16 or 32 GB of internal memory, which is often lacking for modern applications. Combining an internal drive with a microSD card seems like a logical solution, but in MIUI this feature works differently than on other Android devices. Unlike Samsung or Huawei, where memory is combined into a single space, the Redmi 7A uses the Adoptable Storage mechanism with restrictions.

In this article, we have 3 proven ways to combine memory (including the hidden method through ADB), compare their pros and cons, and critical nuances that are not covered in the standard instructions. For example, why some applications stop updating after combining, or how to return everything back without losing data. If you use a 64 GB microSD card or higher, be sure to read the exFAT file system section!

1.What does it mean to "unite memory" on the Redmi 7A?

On Xiaomi Redmi 7A, the term “merging” refers to two different processes:

• 🔄 Formatting the card as internal memory (Adoptable Storage) – the system merges data from the internal drive and card into a single space, but with limitations.
• 📁 Transfer of applications to SD-card - without combining, but with the ability to install part of the software on an external drive.

Importantly, Android doesn't have a full-fledged integration (like Windows with Storage Spaces), instead it creates an encrypted partition on the card that's tied to a particular device, and if you pull out the microSD and paste it into another smartphone, the data will be unavailable.

On the Redmi 7A with MIUI 10/11/12, the function works through storage settings, but there are pitfalls:

• 🚫 The card must be empty (the data will be erased).
• 🔋 After the merger, you can not format the card back without resetting the phone.
• ⚡ The speed of applications from the card is lower than from internal memory (depending on the microSD class).

Method 2: Connecting through MIUI settings (official method)

The easiest way is to use the built-in MIUI feature, which is suitable for users who don’t want to mess with ADB or risk data.

Step-by-step:

1. Insert a microSD card into the slot (up to 256 GB cards are supported).
2. Open the Settings → Memory.
3. Tap on the name of your card (for example, SD-map: 64GB).
4. Select Set Up → Internal memory.
5. Read the warning and click Clean and format.
6. Wait until the process is completed (it can take 5-15 minutes).
7. Reboot the phone.

After the reboot, a single space will appear in the Memory section (for example, Internal Memory: 48 GB is the sum of the internal memory and the card).

⚠️ Warning: If you pull out the card after you merge, the phone won't turn on until it comes back, and the system considers it part of the internal storage.

Advantages of the method:

• ✅ Does not require root rights or PC.
• ✅ Officially maintained (guarantee maintained).

Disadvantages:

• ❌ The map is not readable on other devices.
• ❌ Some applications (such as WhatsApp or Banking software) refuse to work with external memory.
• ❌ Read/write speed drops by 20-40% (depending on card class).

Method 2: Connecting through ADB (for power users)

If the standard method is not suitable (for example, the card is not formatted as an internal one), you can use ADB (Android Debug Bridge), which gives more control, but requires a connection to a PC.

What you need:

• 🖥️ Computer with Windows/macOS/Linux.
• 🔌 USB-Type-C Cable (original so there are no connection issues).
• 📦 Established ADB-driver.
• 📱 The phone has developed Developer Mode and Debugging. USB.

Instructions:

1. Connect Redmi 7A to your PC and allow debugging (a request will appear on your phone screen).
2. Open the command prompt (cmd) and type: adb devices Make sure the device is identified (serial number should appear).
3. Enter the command to check the connected card: adb shell sm list-disks Remember the identifier (e.g., disk:179.64).
4. Format the card as internal memory: adb shell sm partition disk:179.64 private (replace 179.64 with your ID).
5. Reboot your phone: adb reboot

Once you reboot, the map will become part of the internal memory, so to get it back, use the command:

adb shell sm partition disk:179,64 public

⚠️ Note: If you enter the wrong disk ID, you can damage the data on the internal memory of the phone!

Advantages of ADB-method:

• ✅ It works, even if it does. MIUI It does not format the map as an internal one.
• ✅ You can divide the card into two parts: one as internal memory, the other as a removable drive.

Disadvantages:

• ❌ Requires skills to work with the command line.
• ❌ A team error can lead to data loss.

Method 3: Transfer applications to SD-map

If you don't want to be completely connected, but you just need to make room in your internal memory, you can transfer some of your applications to a map, and this method doesn't create a single space, but it saves space.

How to move applications:

1. Open the Settings → Applications.
2. Select the app you want to migrate (like Facebook or Spotify).
3. Slip the vault. → Change. → SD-map.
4. Confirm the transfer.

Limitations of the method:

• 🚫 Not all apps support portability (such as WhatsApp or system utilities).
• 📉 Map apps are slower (especially games).
• 🔄 After updating the application, it can automatically return to internal memory.

How to make the transfer more efficient:

• 🎮 Only transfer rarely used games (e.g. Genshin Impact or Call of Duty).
• 📷 Media files (photos, videos) save to the default map in the camera settings.
• 🗑️ Clean the app cache regularly (Settings) → Memory. → Clear the cache).

💡

If the application is not portable to the map, try using App2SD (requires root rights), which allows you to forcibly move the software, but this can disrupt the stability of the work.

5. Comparison of methods: which one to choose?

To choose the best way, compare them by key parameters:

Selection recommendations:

• 📱 If you want to free up space as much as possible and it is not important that the card is compatible with other devices → MIUI-method.
• 🖥️ If MIUI It does not format the map as an internal one. → ADB-method.
• 🎯 If you need to transfer several applications → transference.

💡

Combining memory via MIUI or ADB does not increase performance, it only expands the space for installing applications. Speed depends on the card class (UHS-I/U3).

Frequent problems and their solutions

When you combine memory on Redmi 7A, users encounter common errors.

Problem 1: The card is not formatted as an internal memory.

• 🔹 Check that the card is not damaged (try formatting it on PC in the future). FAT32).
• 🔹 Use the class map UHS-I (U1/U3) — Cheap cards are often not supported.
• 🔹 Update. MIUI Up to the latest version (old firmware had bugs with Adoptable Storage).

Problem 2: After the merger, the phone started to slow down.

• 🔹 MicroSD cards are slower than internal memory. Try a card with high read/write speed (for example, SanDisk Extreme).
• 🔹 Don’t put heavy games on the map – they will lay down.
• 🔹 Clear the cache in Settings → Memory. → Clear the cache.

Problem 3: Applications are not updated after being transferred to the map.

• 🔹 Move the app back to internal memory, update, then transfer again.
• 🔹 Check out Google Play Settings: Resetting sometimes helps (Settings) → Annexes → Google Play → Warehouse → Clear the data).

⚠️ Note: If the phone doesn't turn on without the card after the memory is combined and the card is damaged, you'll have to do a full reset via Fastboot (fastboot erase userdata!

7. How do you get it back?

If you change your mind about combining memory, you can cancel the changes in two ways:

Method 1: ADB (if the card was combined by this method)

1. Connect your phone to your PC and start the ADB.
2. Enter the command: adb shell sm partition disk:179.64 public (replace 179.64 with your card ID).
3. Reboot the phone.

Method 2: Reset your phone (if the card was combined via MIUI)

1. Make a backup copy of important data (photos, contacts).
2. Go to Settings → About the phone → Reset settings.
3. Choose to erase all data.
4. After reset, the card will be removable, but all data from it will be deleted.

Important: If the card was formatted as an internal one and then retrieved, the phone won't turn on until you insert it back or make a reset.

💡

Before combining memory, be sure to check the card for errors (for example, through H2testw for Windows).

FAQ: Answers to Frequent Questions