Modern Xiaomi, Redmi and POCO smartphones are packed with a huge amount of storage, but system files, app cache and media content can fill up even 256 GB of space in a matter of months. Users often face situations where the device is slowing down or the system is issuing a space shortage warning, but standard analysis methods do not give a complete picture of what is happening. Understanding how memory is distributed on Xiaomi’s Android is key to maintaining high performance of the gadget.
In the Android operating system, especially in the shells of MIUI and the new HyperOS, there are various types of memory that confuse inexperienced owners: operational (RAM) and embedded (ROM). Mistakeful deletion of system files or ignoring the filling of the system partition can lead to critical interface errors. In this article, we will discuss in detail all ways to diagnose storage, from simple settings to advanced engineering menus.
Basic ways to check through the settings menu
The most obvious and safe way to know how much free space your Xiaomi has left is in the standard settings menu, which is available on all versions of the firmware, whether it is the old MIUI 12 or the current HyperOS 1.0. This is a general summary that allows you to quickly assess the state of the drive without going into technical details.
To get the data, you need to go to Settings → About the phone. At the top of the screen, you'll see a pie chart or a text description that shows how many gigabytes are occupied and how much is available from the total, and clicking on this block, the system will redirect you to a more detailed storage management menu.
In an extended menu, often called Memory or Storage, information is structured into categories: apps, images, video, audio, etc. This allows you to instantly identify which type of content consumes the most resources. For example, if the Other section takes up suspiciously much space, this often indicates the accumulation of messenger cache or residual files of remote programs.
⚠️ Note: Do not attempt to manually delete files from system folders through the file manager unless you are sure of their purpose.
It is worth noting that the amount of memory claimed by the manufacturer always differs from the amount available to the user, because some of the internal memory is reserved for the operating system and pre-installed Google services, the difference can be from 10 to 20 GB depending on the version of the shell and the amount of software preinstalled.
Using the Security App for Analysis
Xiaomi’s ecosystem preinstalled a powerful system application called Security, which combines antivirus, accelerator and cleaner functions, and it provides the most accurate and convenient information about disk occupancy, as well as automated cleaning scenarios.
When you run the app and you select Clean up, you'll see not just numbers, but visualizations of junk files, APK-It's the fastest way to free up a few gigabytes without the risk of removing something important.
Why doesn’t cleaning clean up completely?
Deep Cleaning within the same module allows you to analyze large files, duplicate photos and rarely used applications. MIUI algorithms are aggressive enough to tag files for deletion, so always check the list before confirming a transaction.
- 📱 Cache Clearing: Deletes temporary files, speeding up the system without losing personal data.
- 🗑️ Removing duplicates: Finds copies of photos and videos taking up space.
- 📦 Large file analysis: Shows files larger than 100MB that can be moved or deleted.
- 🚀 Memory Acceleration: Frees up RAM (RAM) by closing the background processes.
It's important to distinguish between cleaning storage and cleaning RAM. If your device is slowing down, maybe the problem isn't the lack of disk space, but the overflow of RAM. The Security app allows you to close background tasks with a single click, which often solves the problem of lags.
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For maximum efficiency, conduct a deep cleanup through the Security app at least once a week, which will prevent the accumulation of system “junk” that can slow down the indexation of files.
Real-time Memory (RAM) Checking
Many users confuse memory for file storage (ROM) and RAM (RAM), which is the basis for multitasking in a smartphone. Xiaomi devices have a hidden but very useful tool for monitoring real-time RAM load that does not require third-party software installation.
To activate this widget, go to Settings → Advanced Settings → Advanced Settings → Task View window (the path may vary slightly depending on the version of MIUI). You need to turn on the "Memory Extension" or "Show Memory" switch, then when you open the menu of running applications (bottom-up swipe and hold or menu button), you will see free RAM.
Having a lot of free RAM isn't always good. Android is designed to keep frequently used applications in memory for quick start-up. If RAM is 90% free, it could mean that the system is not managing processes properly or you have forced to close everything that you now have to download again.
Modern models of Redmi and POCO support virtual memory expansion technology, when part of the built-in storage is used as an addition to RAM. You can check the status of this feature in the Settings → Expansion of memory menu.
Detailed analysis through the Engineering Menu and ADB
For advanced users who don’t have enough standard reports, there is an access to the engineering menu and the use of USB debugging, which provides technically accurate information about the state of memory cells, write cycles and real wear and tear of the drive.
You can log in to the engineering menu by typing a special code in the "caller" code. For most Xiaomi devices, the code ##6484## or ##4636## is current. In the menu that opens, you can find the section associated with Storage or device information (Device Info), which displays technical parameters that are not visible in the normal interface.
adb shell dumpsys meminfoThe command above, entered through a computer with an ADB installed (Android Debug Bridge), will give a detailed report on which application exactly how much RAM is currently consuming, an indispensable tool for finding resource eaters that are not visible in the standard task manager.
⚠️ Note: In the engineering menu, it is strictly forbidden to change settings, the value of which you do not know. recalibration or changing memory parameters can lead to a software "brick" of the device.
Using ADB also allows you to see hidden partitions of the file system. the command adb shell df -h will show the size of all mounted partitions, including system, data, cache and recovery. This is useful if you are planning to transfer data or modify the system.
Table: Comparison of memory types on Xiaomi
To organize knowledge and understand the difference between the different types of memory used in Xiaomi smartphones, we turn to comparative analysis, and understanding these differences will help diagnose speed problems correctly.
| Type of memory | Designation | Appointment | Impact on speed |
|---|---|---|---|
| Built-in memory | ROM / UFS | Storage of photos, applications, OS | Application loading speed |
| RAM | RAM / LPDDR | Launch and operation of applications | Multitasking and smoothness |
| Cash memory. | Cache | Temporary data for quick access | Interface response speed |
| Virtual memory | Memory Extension | Expanding RAM with ROM | Retention of background applications |
As you can see from the table, both types of physical memory are responsible for overall performance. If you run out of space quickly, the problem is in ROM. If applications crash or reboot, there's probably not enough RAM.
The Universal Flash Storage (UFS) technology used in today’s flagships of Xiaomi is much faster than the old eMMC. This means that even at the same volume, a phone with UFS 3.1 or 4.0 will open heavy games and programs much faster.
Optimization and cleaning of storage
Once you've learned how to look at your memory on Xiaomi's Android and you've identified the problems, you're in the optimization phase, and simply deleting your photos isn't always the best solution, and there are a number of ways to make room without losing important data.
☑️ Checklist of fast optimization
The first thing to start with is messengers. Telegram and WhatsApp have been accumulating gigabytes of media files for years, go to the settings of each chat or channel, and use the built-in Memory Use feature to delete old videos and files. This often frees up to 5-10 GB.
The second step is to work with the Download folder, and many users forget that downloaded installation files are the only ones that are downloaded. APK, PDF-Your documents and your browser images stay there forever, and checking this directory regularly through the standard Explorer is a good habit.
If internal storage is critically scarce, consider using cloud services. Google Photos with the Free Space feature will automatically delete from the device those pictures that are already securely stored in the cloud.
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Regularly cleaning the messenger cache and download folder is more effective at freeing up space than removing rarely used applications.