How to combine internal memory and SD- card on Xiaomi Redmi 7A: the complete guide

Xiaomi Redmi 7A owners often face a shortage of internal memory, especially if they are actively installing apps, shooting videos or storing large collections of music. One effective way to expand the available space is to combine internal memory with a SD- card, turning it into part of the main storage, but this process has nuances, from choosing the right memory card to potential risks of data loss.

In this article, we will discuss how to securely combine memory on the Redmi 7A, what settings to use in the MIUI, and what to do if the system does not see the card or emits errors, and what types of SD- cards are suitable for this model, and how to avoid common formatting errors.

Before you start, remember that memory consolidation is not just about copying files. Android (in this case MIUI 10/11/12) physically expands the storage partition, and then the card can not be retrieved without losing data, so it is important to assess in advance whether you need such integration or manual file transfer is enough.

1 Which SD- cards are suitable for Redmi 7A: requirements and recommendations

Not every microSD card is suitable for combining with internal memory. Xiaomi Redmi 7A supports microSDXC cards up to 256 GB, but two parameters are important for stable operation in Adoptable Storage mode: speed class and manufacturer.

Minimum requirements:

• 🔹 Speed class: no lower than Class 10 (or UHS-I U1). Class 4/6 cards will brake the system.
• 🔹 Format: FAT32 or exFAT (the system itself will format into ext4 when combined).
• 🔹 Manufacturer: SanDisk, Samsung EVO, Kingston brands are preferred - they are less likely to be forged.
• 🔹 Volume: optimally 32-128 GB. 256 GB cards may not work properly on budget smartphones.

⚠️ Warning: If you bought a memory card at a suspiciously low price (e.g., "256 GB for 500 rubles"), it's likely a fake. These cards often have a real volume of 10 to 20 times less than the stated one and fail when used intensively. Check the card with the H2testw (Windows) or SD Insight (Android) program before combining.

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Before buying, check the card for authenticity using the A1 SD Bench (Android) application, which will show the real read/write speed and help identify left-hand drives.

2.Preparation for the merger: backup and check the card

Before you combine memory, be sure to back up all the data from your phone and the SD- card. When formatting in Adoptable Storage mode, all files on the card will be deleted, and you can not cancel the process.

What to keep:

• 📁 Photos and videos (folders DCIM, Pictures).
• 🎵 Music and downloads (Music folders, Downloads).
• 📱 Contacts, SMS, call logs (use MIUI Backup or Google Account).
• 🎮 Game Save (if the game supports cloud storage, sync with your account).

For backup, it is convenient to use:

Cloud services: Google Drive, Mi Cloud (built into MIUI)

Local Copy: Connect your phone to your PC via USB and copy files manually.

Third-party applications: Titanium Backup (requires root), Swift Backup.

⚠️ Warning: If the SD- card has applications installed in Portable Storage mode, they will have to be reinstalled after the combination. Some programs (such as WhatsApp) may not work properly when transferred to combined memory.

3. Step-by-step instructions: how to combine memory on Redmi 7A

Now, let's get to the process. Make sure that:

- Memory card's in the slot.

The phone is charged at least 50% (it consumes a lot of power when formatting).

You are logged into your Mi Account (in case of resetting).

Steps to unify:

1. Open the Settings → Memory.
2. Tap your name on it. SD-maps (e.g. SanDisk) 64GB).
3. In the upper right corner, press three dots (⋮) and select Storage Settings.
4. Choose Format as an internal memory.
5. Read the warning and press Erase and Format.
6. Wait until the process is completed (it can take 5-15 minutes).
7. After formatting, the system will suggest transferring the data – agree if you want to free up the internal memory.

If the item is not formatted as internal memory, it means:

The card is not supported (too slow or damaged).

You have custom firmware installed without Adoptable Storage support.

The phone does not recognize the card (try rebooting or inserting it into another slot).

Possible problems and solutions

Even if you do the instructions correctly, you can get errors.

Problem 1: After the merger, the phone started to slow down.

• 🔧 Reason: The memory card is too slow (class below U1).
• 🔧 Solution: Buy a card with a higher speed class or cancel the combination.

2 problem: Applications are not installed on the SD- card.

• 🔧 Reason: Not all programs support installation to an external storage.
• 🔧 Solution: In the application settings (Settings → Applications → [name] → Storage), select Change and specify the SD- card.

3 problem: The system says "SD- card is damaged."

• 🔧 Cause: The card file system is broken or the card itself is out of order.
• 🔧 Solution: Format the card on a PC in FAT32, then repeat the process of combining.

⚠️ Warning: If after the phone is combined, it starts to spontaneously restart or it starts to give an error, "Com.android.media is terminated," the memory card is likely incompatible.

1. Reboot your phone in Recovery Mode (clip Power + Volume up).
2. Select Wipe & Reset → Format Data (this will erase all data!).
3. After reset, insert another SD- card and re-unite.

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If the memory of the phone has not increased after the combination, make sure that the card is formatted as an internal card, not as a portable card, otherwise the system will use it only for storing files, but not for installing applications.

5 How to cancel the memory merger and bring it all back

If you decide to disconnect the memory (for example, to retrieve the SD- card), you can do this, but all the data on the card will be deleted.

Instructions for separation:

1. Go to Settings. → Memory.
2. Tap on the SD- card and select Format as portable.
3. Confirm action. The card will be formatted in FAT32/exFAT and will become a regular removable drive.

⚠️ Warning: Once disconnected, all the apps installed on the SD- card will stop working. They will have to be reinstalled manually, and some files may also be missing if they were stored only on the map.

If the phone does not allow you to format the card back, try:

Remove the card and paste it into another phone or PC, then format it.

Reset your phone to factory settings (Settings → About Phone → Resetting), but this will remove all data from internal memory.

6.Alternative ways to expand memory on Redmi 7A

Memory pooling isn’t the only way to free up space on the Redmi 7A. If you don’t want to risk data or your card isn’t suitable for Adoptable Storage, consider alternatives:

Method 1: Transfer applications to SD- card manually

• 📱 Go to Settings. → Annexes.
• 📱 Select the desired application and tap the Storage.
• 📱 Press Change and specify the SD- card (if the option is active).

❗ Restriction: Not all applications support portability. System programs (e.g., Google Play Services) remain in internal memory.

Method 2: Using Cloud Storage

• ☁️ Google Photos – Automatically upload photos and videos to the cloud.
• ☁️ Mi Cloud – 5GB free for Xiaomi backups.
• ☁️ Yandex Disk or Mega – up to 50 GB of free space.

Method 3: Cleaning up cache and unnecessary files

• 🧹 Use the built-in Cleanup utility in MIUI (Settings → Memory → Cleanup).
• 🧹 Remove the app cache manually (Settings → Apps → [name] → Clear the cache).
• 🧹 Move heavy files (movies, music) to a PC or external hard drive.

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To automatically clear the cache, enable the Auto Clean option in Settings → Memory → Three dots (⋮) → Auto Clean. The phone will delete unnecessary files once a week.

7. Frequent questions about memory pooling on Redmi 7A

8.Conclusion: Should I combine memory on Redmi 7A?

Combining internal memory and SD- cards on Xiaomi Redmi 7A is an effective way to expand storage, but not for everyone.

- You're critically short of space for applications.

You have a fast and reliable memory card (UHS-I U1/U3).

You are prepared for the fact that the card can not be removed without losing data.

If you just want to store photos or music, you should use the SD- card in portable storage mode or upload files to the cloud. Also remember that on some custom firmware (for example, LineageOS), the Adoptable Storage function may not work correctly or at all.

Before making a decision, evaluate the pros and cons:

• ✅ Pros: More room for applications, no need to constantly clean the memory.
• ❌ Cons: risk of data loss, possible lags, inability to retrieve the card.

If you do, follow the instructions carefully and remember to back up. Good settings!