Xiaomi is suddenly slowing down and notifications of space shortages appear at the most inopportune moment, familiar to every smartphone owner. Users often wonder where hundreds of gigabytes that seemed to have been free only yesterday could go. The MIUI or HyperOS system is designed in such a way that standard meters do not always show the real picture, hiding behind the numbers "Other" gigabytes of garbage.
Understanding storage structure is key to your device’s performance. Logical file system sections can become overflowing due to indexing errors or the actions of specific resource-eating applications. In this article, we’ll look at not only the obvious folders, but also the hidden mechanisms of data storage that are often overlooked.
Before we start radical measures like resetting, we need to make a thorough diagnosis of the content, which will save important data and accurately identify the culprit of the problem, whether it is a messenger, streaming service or a system failure.
Analysis of the built-in storage analyzer
The first step for any Xiaomi owner is to use the standard tools of the system. The MIUI shell and the new HyperOS have a fairly powerful, but often ignored analyzer built in, which is located in the Security app and allows you to see the distribution of space by category: applications, images, videos, documents and so on.
But you have to understand that a standard analyzer often groups data in too general a way, like the Documents folder, which can be inflated by browser cache or temporary office applications that the system doesn't always classify correctly. Visualization works well here, but the detail is limping.
📊 Which category takes up the most space in your Xiaomi?
Applications and games:Photos and videos:System files (Other): Garbage and cache
When using the built-in cleaning tool, be careful with the Deep Clean feature, which can delete stored Wi-Fi passwords or game progress if not configured correctly. Always check what is marked for removal before final confirmation.
⚠️ Attention: The built-in analyzer may show incorrect data immediately after a major system update. 1-2 Hours at rest with Wi-Fi connected to re-index files.
Hidden folders and system debris
A significant portion of the space is often occupied by files that the user does not see in a regular gallery, which are so-called hidden folders that start with a dot, or directories with names like.thumbnail, which store thumbnails of the photos and videos viewed, which can weigh tens of gigabytes.
Social media and instant messengers are particularly aggressive. Telegram, WhatsApp and Viber store every media you watch in cache, even if you just flip through the feed. Xiaomi's standard file manager by default hides some system directories so that the user does not accidentally delete critical components.
Where to find the heaviest hidden files
The largest volumes of data usually hide along the way. /Android/data/ and /Android/obb/. It's where the caches of games and heavy apps are stored. /MIUI/gallery/cloud/secret/, If you have used a hidden album.> To access hidden files, you need to activate the appropriate switch in the file manager settings. Usually the path is: → Show hidden files. Once you turn on, you'll see translucent folder icons that were previously invisible. 📂.thumbnails folder: Stores sketches of all images ever viewed, can reach 10-20 GB. 📂 Tencent directory: relevant for users of WeChat or games from this developer, accumulates gigabytes of garbage. 📂 SystemUI: This can store logs and temporary interface files that are rarely needed by the average user. The undisputed leader in memory consumption in Xiaomi smartphones are messengers. The mechanism of their work involves saving a copy of each received file on the device. If you have saved to the gallery enabled, each chat photo is duplicated, taking up space twice in the app database and in the overall album, and cleaning the cache inside the app itself is often not effective enough, as the compression algorithms may not work properly. The best way to use built-in media cleaning tools is to use the settings of a particular messenger. For example, in Telegram this is the Data and Memory section. → Use memory where you can configure automatic cache removal. ☑️ Checking messengers Open settings Telegram/WhatsApp:Go to Data and Memory:Click Clear Cache:Cert the Downloads folder in the file manager: 0 / 1 Voice messages and video circles deserve special attention, and they are often stored in formats that are not recompressed and take up a disproportionate amount of space relative to their duration. Regularly auditing chats with active participants in correspondence can free up several gigabytes. ⚠️ Before clearing messenger data, make sure that important files are stored in the cloud or on your computer. Permanent deletion of correspondence through the phone's storage settings can lead to loss of history. Owners of Xiaomi smartphones with dual-SIM support or using the “Second Space” function often face the problem of duplicates. It can store a copy of a photo in different directories, especially if you've used different cameras or editors. It also happens when you sync with cloud services like Google Photos or Mi Cloud if your download settings are down. It's a time-consuming process to find and remove duplicates if you do it manually. Fortunately, there are specialized applications and scripts that compare hash sums of files, finding exactly identical copies even with different names. This allows you to safely delete the extra ones by leaving one original. Type of duplicate Where to look for Security of removal Approximate volume of sketches (Thumbnails) /DCIM/.thumbnails High (restored) 2-15 GB Cash Instagram /Android/data/com.instagram.android Medium (requires login to the account) 1-5 GB Second Space /data/media/0/SecondSpace Low (file check required) 5-30 GB Deleted Photos Gallery Recycle Bin High Depends on the user Don't forget to check the folder "Recently deleted" in the gallery. Files are stored there. 30 They're still taking up space on the disk, even though they're visually considered deleted by the user. ADB For advanced users who want to know everything about their device, the best tool will be Android Debug Bridge (ADB). This method allows you to access disk usage statistics at the system level, bypassing the limitations of the graphical interface. ADB They can show the exact size of each folder, including the system folders, which are hidden from view. USB One of the most useful commands for analysis is adb shell dumpsys diskstats, which displays a detailed report of how space is used. adb shell dumpsys diskstats You can also use the command to get a list of all files sorted by size, which instantly reveals "heavyweights": adb shell ls -lR /sdcard | sort -k5 -n -r | head -n 20 Use of the ADB Incorrectly deleting system files through this interface can lead to a cyclic reboot or data loss. Always back up before tampering with system partitions. Third-party analyzers and visualization If embedded tools don't seem informative enough, third-party apps from Google Play come to the rescue. The leaders in this niche are Files by Google, DiskUsage, and Storage Analyzer. They build interactive memory cards where the size of the rectangle matches the size of the file or folder. This visualization allows you to instantly find forgotten archives, old downloads, or cache of remote applications. The DiskUsage app, for example, displays the structure of the directory tree in the form of blocks, which is extremely convenient for navigation through open source data, however, you need to remember the full file file file file-based file-based file-based file-based analysis. ⚠️ Warning: Avoid installing accelerators and cleaners by unknown Chinese developers, often the source of advertising and intrusive notifications, further clogging memory. To prevent the problem from returning regularly, you need to develop a habit of controlling storage. Automatic cache cleaning once a week is the gold standard of maintenance of the Xiaomi smartphone. Set up automatic deletion of old messages in instant messengers and limit the cache size in your application settings. Use cloud storage to archive photos and videos. Services like Google Photos or Yandex.Disk can automatically free up space on your device after successfully downloading copies. This creates the illusion of infinite memory on the phone. 💡Regular reboot of the smartphone (once in a week) 3-4 It helps the system to correctly complete the background processes and clean temporary files, preventing the growth of system debris. MIUI And HyperOS often fixes memory leakage errors and optimizes the file system. Don't ignore notifications about available updates. Why does memory fill up on its own after a reboot? This can be due to system logs or an error in indexing media files. Try clearing the Media Service cache in the application settings. If the problem persists, there may be file system errors on the memory card (if any). Android/data? You can’t delete the entire folder completely – it will reset the settings of all applications. However, it is safe to clean the contents of specific folders inside (such as a browser or game cache), but the application may request re-authorization or resource download. How do you know which application consumes the most memory? Go to Settings → Annexes → Manage your applications and sort the list by size. Not only do you pay attention to the size of the application itself, but you also pay attention to the amount of data and cache that often takes up 90 percent of the space.