How to combine your phone memory and SD-maps on Xiaomi Redmi 7A: all manner of ways and pitfalls

Owners of Xiaomi Redmi 7A Often, they face a lack of internal memory, especially if the device is used to store photos, videos or heavy applications. One way to solve this problem is to combine internal memory with a large number of devices. SD-But the process has its nuances, from choosing the right map format to understanding the performance and security implications of the data.

On the Redmi 7A with MIUI firmware (versions 10-12), memory integration is implemented through the Adoptable Storage feature, but it does not work as clearly as on “pure” Android. For example, once combined, the card will not be retrieved without losing data, and some applications may refuse to install on it. In this article, we will analyze all the available methods – from standard settings to manual solutions through ADB – and also tell you which memory cards are best for you and how to avoid typical errors.

If you've tried to combine memory and you've had problems (e.g., the phone doesn't see the card after formatting or the apps don't carry over), you'll find solutions here. SD-We have prepared a compatibility table and recommendations for speed classes.

1. Which one? SD-Cards are suitable for combining with Redmi memory 7A

Not every microSD card can handle the role of “expanding internal memory.” Xiaomi Redmi 7A supports cards up to 256 GB, but for stable operation in Adoptable Storage mode, three parameters are important: speed class, file system type and manufacturer.

Minimum requirements:

• 🔹 Speed class: not lower than Class 10 (UHS-I U1). For video recordings in 4K Frequent operations with files are better to choose UHS-I U3 or A1/A2 (optimized for applications).
• 🔹 Volume: from 16 GB to 256 GB. Cards less than 16 GB system may not offer for the combination.
• 🔹 Manufacturer: give preference to brands SanDisk, Samsung EVO, Kingston Canvas or Transcend. Cheap no-name cards often forge speed class markings.

Important: once combined, the card will be formatted in ext4 or f2fs (depending on the version of MIUI), and it will not be read on a PC without special utilities, and the card will be “tied” to the phone - when removed, some applications will cease to work.

⚠️ Note: If you are using a card previously formatted as internal memory on another phone, Redmi 7A It may not be recognized, and you'll have to clean the card completely through a PC (e.g., utility). SD Card Formatter).

2. Preparation of the phone before memory combination

Before you combine memory, follow a few mandatory steps:

• 📱 Back up your phone (photos, contacts, messages). Use Settings → System system → Backup or third-party applications like Swift Backup.
• 🔋 Charge the phone to at least 50%. The process of formatting and transferring data can take 10 to 30 minutes.
• 🛠️ Update. MIUI In the old firmware (for example, in the latest version, MIUI 10) the memory consolidation function may not work smoothly.
• 📁 Transfer important files from SD-PC cards – after formatting they will be deleted.

Also check if the map contains hidden file system partitions or errors, and connect it to your computer and execute the command in Command Prompt (Windows):

chkdsk X: /f

(where X: is the letter of your disk SD-map).

If the phone hasn’t previously recognized the card, try restarting it with the card inserted or clearing the Storage app’s cache (Settings → Apps → App Management → Storage → Clear the cache).

Method 1: Memory Combination through MIUI settings

This is the simplest method that works on most MIUI versions (10-12) and is the same as the Redmi 7A with the original firmware:

1. Put it in. SD-You can wait for the system to recognize it (the notification will appear "New" SD-map").
2. Go to Settings. → Warehouse.
3. Tap your name on it. SD-maps (e.g. "SanDisk" 64GB").
4. In the upper right corner, press three dots (⋮) and select "Storage settings".
5. Select "Inner Memory" (or "Format as Internal Memory").
6. Read the warning that the card will be encrypted and tied to the device, then click "Format".
7. Wait until the process is complete (it can take up to 10 minutes).

After the reboot. SD-The card will become part of the internal memory. To check this, go back to Settings. → Storage – now you will see the combined volume (for example, “16 GB”) + 64GB").

What if there is no “Inner Memory” item?

• 🔄 Check that the card is formatted in FAT32 or exFAT (if) NTFS, The phone won't see her).
• 📱 Update. MIUI until the latest version MIUI 9 and older, the function may not be available).
• 🛠️ Try an alternative method through ADB (described below).

Make a backup of the phone |

Charge the battery >50%|

Update MIUI to the latest version|

Transfer important files from SD-map|

Check the card for errors through chkdsk-->

Method 2: Connecting through ADB (for power users)

If the standard method didn’t work (for example, there’s no formatting option on the menu as internal memory), you can use Android Debug Bridge (ADB), which requires connecting your phone to a PC and knowing the command line.

Step-by-step:

1. Download and install ADB Tools on PC.
2. Turn on the phone Developer Mode: go to Settings → About phone and 7 times tap on the item MIUI version.
3. Return to Settings → Additional → For developers and activate “Debugging by USB”.
4. Connect your phone to your PC through USB-Cable (use the original cable for stability).
5. Open the command line (Windows) or terminal (macOS/Linux) in the adb folder and execute commands in order: adb devices (you should see your device name - if not, check the drivers). adb shell sm list-disks (remember the disk ID, for example, disk:179.64). sm partition private disk:179.64 (replace disk:179.64 with your exit adb reboot ID).

After the reboot. SD-If the sm partition command doesn't work, try an alternative:

sm set-force-adoptable true

Then repeat the steps with the sm partition.

⚠️ Warning: If after completing the commands, the phone stopped booting or the card is not recognized, try resetting the settings via Recovery (click Power). + Volume up when you turn it on. In extreme cases, you'll have to reflash the device.

5 How to transfer applications to SD-post-community

Even after successful memory integration, not all applications will automatically move to the memory. SD-To make room in the internal memory, do the following:

Method 1: Through Application Settings

1. Go to Settings → Applications → Application Management.
2. Select the app you want to migrate (like WhatsApp or Google Maps).
3. Slip the Storage" → "Change".
4. Choose "SD-card" (if the option is active).

Method 2: With the help of third-party utilities

• 📱 AppMgr III (App 2 SD) — Shows you which apps you can transfer and does it in one click.
• 📱 Link2SD — It allows you to create symbolic links for applications that do not support portability (requires root rights).

Note that some system applications (such as Mi Store or Security) cannot be moved, and some data (cache, settings) may remain in internal memory.

💡

If the application starts to slow down after transfer, try to clear its cache (Settings) → Annexes → [name] → Warehouse → Clear the cache. Also check the speed. SD-If it is below Class 10, lags are inevitable.

Possible problems and solutions

Memory integration is not always a smooth process, but here are the typical mistakes and ways to fix them:

Problem 1: The phone can't see SD-map

• 🔌 Remove and re-insert the map.
• 📱 Reboot the phone.
• 🛠️ If the card is damaged, try formatting it on PC in the FAT32 assisted SD Card Formatter, then repeat the process of combining.

Problem 2: Appendices are not installed on SD-map

• 📌 Check if the app supports portability (some games and system utilities – no).
• 🔧 Use it. ADB, to force the installation: adb shell pm set-install-location 2 (this will set the SD-Map as the default location for new apps).

Problem 3: The phone slows down after the merger

• ⚡ Check the speed class SD-cards if it is slower UHS-I U1, replace her.
• 🧹 Clear the cache of system applications (Settings) → Warehouse → Clear the cache).
• 🔄 Turn off animation in the developer settings (Settings) → For developers → Scale of animation → No animation).

Problem 4: You can't get out. SD-map

It's normal behavior after the merger.

1. First, transfer all applications back to internal memory.
2. Go to Settings. → Warehouse → SD-map → Settings → Formatting as a portable.
3. Confirm the formatting (the data will be deleted!).

💡

If after combining memory, the phone began to overheat or discharge quickly, most likely, the cheap phone is to blame. SD-Replace it with a speed class at least below. A1 or U3.

7. Alternative ways to free up memory on Redmi 7A

If combining memory seems too risky or is not suitable for other reasons, consider alternatives:

1. Clearing cache and unnecessary files

• 🧹 Use the built-in Cleanup utility (Settings) → Warehouse → Clean up).
• 🗑️ Remove the application cache manually (Settings) → Annexes → [name] → Warehouse → Clear the cache).
• 📂 Move your media files (photos, videos) to the cloud (Google Photos, Mi Cloud) or PC.

2.Use of SD-maps as portable storage

If you do not want to tie the card to your phone, format it as portable:

1. Put the card in the phone.
2. Go to Settings. → Warehouse → SD-map → Settings → Formatting as a portable.
3. The card can now be retrieved and used on other devices.

The downside: the application will not be able to transfer to it, but you can store photos, music and documents.

3. Root access and custom firmware

For advanced users:

• 🔓 Get root rights (e.g., through Magisk) and use FolderMount or Link2SD flexible memory management.
• 📲 Install custom firmware (such as LineageOS) where Adoptable Storage is more stable.

⚠️ Attention: Getting root rights voids the warranty and can lead to unstable phone performance. on Redmi 7A With an unlocked bootloader, the risk of installing malware also increases.

FAQ: Frequent questions about memory integration