Smartphone users Xiaomi, Redmi i Poco sooner or later face the same problem: the built-in storage is rapidly filling up, despite the lack of a large number of installed applications. It is at this moment that an annoying notification appears on the screen that the free space is running out, and the system begins to work with noticeable delays. Device owners often wonder where tens of gigabytes could have disappeared if they didn't download heavy games or shoot videos in 4K resolution. In fact, the shell MIUI or the new HyperOS has its own characteristics of resource distribution, which are not always obvious to the average user.
In order to effectively free up space, you need to not just delete random photos, but understand the architecture of the file system of your device. Hidden folders, overgrown messenger databases and system logs can take up up to 40% of the total storage capacity. In this article, we will analyze in detail which processes consume resources, how to use the built-in diagnostic tools, and what actions will help restore the smartphone to its former speed without losing important data.
System processes and hidden memory sections
The first thing to consider when diagnosing is the peculiarities of dividing memory into logical sections in the Android environment. Part of the volume specified in the specifications upon purchase is always occupied by the operating system itself and pre-installed Google services. However, over time, this section can grow due to the so-called system logs temporary update files. If you recently updated the firmware over the air (OTA), then old installation packages may remain in memory, taking up from 2 to 5 GB of space.
Particular attention should be paid to the folder Android/data, which is designed to store the cache and additional files of installed applications. Many users mistakenly believe that clearing the cache through standard settings completely solves the problem, but some apps, especially social networks and browsers, create duplicate copies of media files here. This is done to speed up the loading of content when reopened, but in the long run it leads to uncontrolled growth of the occupied space.
Use the “Secure Folder” or “Second Space” mode only when necessary, as they create a complete copy of the system libraries, eating up an additional 5-10 GB of memory.
It is also worth noting the work of the service Media Storage. It indexes all files on the device for quick search in the gallery and file manager. Sometimes this process freezes, creating huge databases of thumbnails that are not actually needed, but are listed in the system as important files. Forcibly stopping this service and clearing its data often helps to regain several gigabytes of free space.
⚠️ Attention: Never delete files from the system root folder manually through third-party file managers with superuser rights unless you are 100% sure of their purpose. This can lead to a cyclic reboot of the smartphone (bootloop).
Messengers as the main space eaters
The undisputed leader in memory consumption in 2026-2026 are instant messengers, first of all Telegram i WhatsApp. These apps are set by default to automatically download all received media files to the device's internal memory. Users often do not notice how hundreds of videos, stickers and voice messages from work chats and channels are downloaded in the background.
In the case of Telegram the situation is aggravated by the fact that the application stores a cache not only in a shared folder, but also in its own protected directory. Even if you delete a video from a chat, a copy of it may remain in the app's cache, awaiting manual clearing. Standard Android tools do not always correctly display the real size of this data in the general list of applications, masking the true scale of the problem.
To solve this problem, you need to go to the settings of a specific messenger and change the startup settings. In WhatsApp this is done through the section Data and storage → Autoload mediawhere you should disable the downloading of videos and photos when using mobile data and Wi-Fi. In Telegram a similar setting is in the menu Data and memory → Autoload media. Regular manual clearing of the cache within the applications themselves is the most effective method of control.
Analysis of memory use by built-in MIUI and HyperOS tools
Xiaomi shells provide a powerful built-in storage analysis tool, which is often ignored by users in favor of third-party apps. To access detailed statistics, go to menu Settings → About phone → Storage. Here the system visualizes the distribution of space by category: applications, images, videos, audio and system files.
One of the most useful functions is the ability to sort files by size. By clicking on the “Files” or “Documents” category, you will see a list of the largest objects, regardless of their type. Often forgotten archives, APK installation files from long-deleted games, or downloaded presentations are found there. Deleting even five of these files can free up more space than completely emptying the Gallery Recycle Bin.
| File Category | Typical Size (GB) | Recommended Action |
|---|---|---|
| App Cache | 2 – 15 GB | Cleaning through application settings |
| DCIM folder (Camera) | 5 – 50+ GB | Transfer to PC or cloud |
| Messengers (Media) | 3 - 20 GB | Setting auto-delete media |
| System partition | 10 - 25 GB | Do not touch (reset only) |
There is also a function in the cleaning interface search for duplicates. MIUI algorithms scan the gallery for duplicate photos taken in burst mode or duplicate screenshots. Deleting duplicates is a safe way to quickly gain additional space without the risk of losing unique pictures.
☑️ Monthly memory maintenance
Hidden folders and forgotten downloads
Many users are unaware of the existence of a number of system folders that accumulate “garbage” throughout the life of the smartphone. The Download (Downloads) folder is a classic example: browsers, email clients and instant messengers save all downloaded files there, which are rarely opened again. Over time, documents, installers and temporary archives accumulate there.
Another hidden reservoir is the folder MIUI/debug_log or similar directories for debugging. They record system and application error reports. If your phone crashes frequently, these logs can reach several gigabytes in size. They can be safely deleted, since they are needed only by developers to analyze problems, and will not bring any benefit to the average user.
Do not forget about the folder Thumbnail inside the directory DCIM. It stores small copies of all your photos and videos for quick display in your gallery. With tens of thousands of pictures, this folder can weigh hundreds of megabytes. Clearing it will speed up the gallery, but the next time you open albums, the system will spend a little time re-generating thumbnails.
How to find the largest files manually?
Use the Explorer application from Xiaomi, click on the menu (three bars) and select “Analysis”. There will be a “Largest files” section, sorted by size.
The influence of streaming services and offline content
Modern services for watching videos and listening to music, such as YouTube, Netflix, Spotify or Yandex.Musicoffer an offline mode function. Users often download movies, TV series and playlists to watch on the go, forgetting that this content takes up space on the internal storage. One high-quality video can weigh from 1 to 3 GB.
The problem is aggravated by the fact that these files are often encrypted or saved in specific formats that are invisible to a regular file manager like video files. They appear simply as space taken up in the application settings. If you stop watching the downloaded series, do not forget to go to the “Downloads” section inside the application itself and delete this content.
In addition, navigation applications such as Yandex.Maps or 2GISallow you to download maps of entire regions and cities for working without the Internet. A map of a large area with detailed detail can occupy several gigabytes. Check your navigator settings and delete maps of those regions where you do not plan to go in the near future.
⚠️ Attention: The interface and location of settings may vary slightly depending on the version of MIUI or HyperOS. If you do not find a specific item, use the search bar at the top of the settings menu.
Radical methods: resetting and transferring data
If software cleaning does not give the desired result and the memory fills up again almost immediately after deleting files, the problem may lie in deep system errors or fragmentation of the file system. In such cases, the only effective solution is to completely reset the device to factory settings. This action completely wipes the partition userdata, removing all applications, settings and files.
Before performing this procedure, it is critical to back up all important data. You can use a cloud service Xiaomi Cloud, Google Drive or transfer files to your computer via a USB cable. After the reset, the phone will work as fast as on the first day after purchase, and the memory system will be redistributed in an optimal way.
Another unloading option is to use a memory card microSDif your smartphone model supports its installation. In the storage settings, you can set the memory card as the default recording location for photos and videos from the camera. However, it is worth remembering that the speed of applications installed on a memory card will be lower than when installed in internal storage.
A full reset to factory settings (Hard Reset) is the most effective way to combat “phantom” memory filling caused by system errors, but requires a mandatory data backup.
Why is the memory fast again after cleaning is filling up?
This often happens due to the fact that background processes of instant messengers or system services immediately begin to regenerate the cache and logs. There may also be malware that downloads files without your knowledge. In this case, it is recommended to check your phone with an antivirus and review the startup settings in applications.
Is it possible to delete the Android folder completely?
No, you absolutely cannot delete the entire folder. Android . This will lead to incorrect operation of all installed applications, loss of game saves and reset of app settings. You can delete only the contents of subfolders cache within specific application directories, but it is better to do this through the settings of the application itself.
Does full memory affect the speed of Xiaomi?
Yes, it does critically. When the free space on flash memory is less than 10-15%, the speed of writing and reading data drops significantly. This leads to interface freezes, long application launch times, and camera malfunctions. Maintaining at least 3-5 GB of free space is mandatory for stable operation of the system.
Where are the deleted files on Xiaomi?
Deleted photos and videos go to the “Trash” folder inside the “Gallery” application and are stored there for 30 days. Files deleted through Explorer may also be located in the local trash of the file manager if this feature has been activated in the settings. After emptying the recycle bin, recovery without special software is impossible.
Why does the system write “Memory is full”, although there is a lot of space?
Such a message may appear due to an error in indexing media files or a failure in the storage service. Try rebooting your device. If the problem persists, clear the data of the Media Storage application in the application settings menu by searching for it by name.