Owners of budget smartphones often face a lack of free space, and the Redmi 7 model is no exception. Despite the presence of a memory card slot, many applications categorically refuse to install on external drives, requiring internal storage. This creates a situation where the internal memory is filled with system files and cache. SD-The solution could be to combine the physical amount of memory or create a virtual partition.
This process is technically complex and requires understanding the Android file system. The operating system divides memory into logical blocks, and standard methods can not "glue" them without obtaining advanced access rights. However, there are proven ways to redistribute resources that allow you to effectively use the available volume. It is important to understand the risks associated with interference with system partitions.
Before you start taking action, you need to be clear about the difference between data porting and real partitioning. In the case of Xiaomi, it is more often about creating a paging file or reconfiguring write paths. Without root rights, full memory partitioning on Redmi 7 is impossible. Any manipulation of the bootloader or system files carries a potential risk of data loss, so (backup) is a mandatory first step.
Preparation of the device and necessary tools
The initial stage requires careful preparation of the workplace and the gadget itself. You will need a computer running Windows or Linux, a high-quality computer. USB-cable and charged smartphone: Lack of stable connection can interrupt the transfer of critical files, which will lead to errors in the system. Do not neglect the quality of the cable, as cheap analogues often do not provide the necessary data transfer speed.
To work with system partitions, you need to activate the developer mode. This is a hidden menu that gives you access to debugging over USB. Go to Settings → About your phone and quickly click on the MIUI build number seven times. Then a new "Developers" item will appear on the menu, where you need to turn on the corresponding switchboard. Without this step, the computer will not be able to interact with the device at a deep level.
You also need to download and install the ADB and Fastboot package on your computer. This is a set of command-line utilities that allows you to send commands directly to the smartphone operating system. The graphical interface here will not help, all actions will be done through text commands. Make sure that the drivers for Xiaomi are installed correctly and the device is determined in the task manager.
☑️ Preparation for memory modification
Analysis of the current structure of sections
Before you change anything, you need to understand how exactly the memory is distributed on your Redmi 7. Standard markup implies a partition /system for the OS, /data for user data and /cache for temporary files. Often manufacturers allocate a fixed amount to the system that cannot be changed without flashing. The rest of the space is given to the user, but it is limited to a physical memory chip.
You can use a terminal or a special application to view detailed information. df will show you the current use of disk space, and cat /proc/partitions will display a list of all partitions. Pay attention to the columns with the size of the blocks. If the userdata partition takes up almost all the free space and the system is full, this is a signal to action. In some cases, cleaning the cache partition helps, but this is a temporary measure.
⚠️ Warning: Incorrectly resizing system partitions can cause the phone to stop booting (bootloop.
There is a myth that formatting an Adoptable Storage card completely solves the problem. In practice, in the MIUI shell, this function is often hidden or unstable. The system may refuse to transfer critical data to an external drive, considering it less reliable. So software extending internal memory through ADB remains the most effective, albeit difficult method.
Creating a Swap File Through ADB
One way to trick a system into expanding the available space for RAM or virtual memory is to create a swap file, which doesn't physically merge partitions, but creates a file on a memory card that the system perceives as an extension of RAM, which can speed up heavy applications on Redmi 7.
The process starts with connecting your smartphone to your PC and running the command line in the ADB folder. Enter the adb shell command to enter the device shell. Next, you need to mount the memory card and create the right size file. The commands are entered sequentially, with a check of the result after each step. A syntax error can lead to the creation of a broken file that will take up space but not work.
adb shell
su
dd if=/dev/zero of=/sdcard/swapfile bs=1M count=1024
mkswap /sdcard/swapfile
swapon /sdcard/swapfileOnce you do this, the amount of virtual memory available will increase by the specified size (in example, 1 GB). However, automatically connecting the file when you download it will require you to prescribe a command in the initialization script or use specialized modules for Magisk. Without automation, you will have to repeat the procedure after each reboot, which is inconvenient. Users often forget this nuance, leaving no effect after turning off the phone.
What is ZRAM and how is it related to Swap?
Using Link2SD to port applications
A safer and more popular method of memory management is the use of an app. Link2SD. This utility allows you to create symbolic links to the second partition of the memory card. For Xiaomi Redmi 7, this is the best option, which does not require deep interference with system files. SD-map to which application files are transferred (apk, lib, dalvik).
The first step is to re-mark the memory card, and you can do this through a computer using MiniTool Partition Wizard or something like that. You have to create two partitions: one is FAT32 (for files), the other is ext4 or ext3 (for applications), the second partition is hidden from the normal gallery and explorer, but is accessible to the system through root rights. The size of the second partition depends on your needs, usually allocated 2-4 GB.
Once you have your memory card ready, install Link2SD from Google Play. When you first start, request superuser rights and ask you to select the file system of the second partition. Specify the one you chose when markup (ext4). Once you reboot the app settings, you can turn on Autolink. All new apps will be automatically transferred to the map, freeing up internal space.
| Parameter | Description | Recommended value |
|---|---|---|
| Type of section | File system of the second section | ext4 |
| Section size | Volume of annexes | 2048MB - 4096MB |
| Speed of the map | MicroSD Speed Class Class | Class 10 / UHS-I |
| Priority | What to carry first | Hard games and social media |
Optimizing the system without root rights
If you think it's too risky to get super-user rights, there are less radical ways to free up space. First of all, look at the MIUI/Gallery/cloud/cache folder, where thumbnails of photos accumulate. Cleaning them can free up hundreds of megabytes. It's also useful to regularly clean the cache of instant messengers like Telegram and WhatsApp, which have built-in tools to manage the space.
Redmi 7 has a memory extension feature, but it often refers to virtual RAM rather than ROM. However, it’s worth checking for system updates in the Settings → About Phone menu. Xiaomi engineers periodically release patches that optimize the file system and reduce the size of system debris. The current version of MIUI works more stable and manages resources more efficiently.
Another effective way is to use “lightweight” versions of applications (Lite), which take up significantly less space and consume less RAM. For Android, there are versions of Facebook Lite, Messenger Lite and other analogues, their installation requires no complicated manipulation and is available through Google Play, which allows you to save functionality without loading internal storage.
⚠️ Attention: When in use Link2SD It is critically important not to retrieve the memory card without first disabling the application in the settings. Sudden retrieve can lead to the crash of applications or loss of saves.
Possible errors and ways to eliminate them
In the process of memory modification, users often encounter partition mounting errors. If Link2SD does not see the second partition, check if it is formatted correctly. The file system must be ext4 or ext3, the NTFS file system or exFAT link application does not support. Re-formatting via a PC usually solves the problem of visibility.
Another common problem is cyclical reboot after installing memory management modules, in which case you need to boot into Recovery mode. On Xiaomi, this is done by pressing the volume button "up" and the power button. In the recovery menu, you can swipe the cache (Wipe Cache) or delete the problem module through the file manager if you have access to system files.
If the phone is slow after all the manipulation, it may be that the memory card has a low write speed. Cheap microSD cards can not cope with the intensive work that modern applications require when running from an external drive, in which case it is recommended to replace the card with a model labeled A1 or A2, designed to work with applications.
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Use the command "adb shell pm list packages -f" to view a list of all installed applications and their installation paths. This will help you find heavy programs that occupy space in the system partition.
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The safest and most effective way to combat memory shortages on Redmi 7 without flashing is to create a second ext4 partition on a fast memory card and use Link2SD.