Where did memory go on Xiaomi: analysis of the reasons after deleting files

When a Xiaomi smartphone signals a storage overflow immediately after a large-scale removal of photos and apps, it is puzzling and annoying. The user is sure that he has freed gigabytes, but the system indicator shows the red zone and the speed of the device drops. This is a common problem that Android smartphone owners face, and it is rarely associated with a physical drive breakdown.

The main reason is how MIUI or HyperOS manages the file system, and removing objects that are visible to the user is just the tip of the iceberg, leaving behind temporary files, update logs, remote application data, and reserved partitions that don't disappear automatically, and deep diagnostics are needed to get the phone back up.

In this article, we will discuss the technical aspects of memory allocation, explain the nature of phantom data, and provide a step-by-step algorithm for actions, learn how to distinguish system files from garbage, properly clean the cache, and use hidden developer tools to accurately analyze disk space.

System cache and temporary application files

The first place where missing memory is hidden is the app cache. Many users mistakenly believe that deleting a photo from a gallery frees up space in messengers or a browser. However, Telegram, WhatsApp and Chrome have been accumulating videos, stickers and web pages they have watched for years in hidden folders. Even if you deleted the app itself, its data folder could have stayed on the system.

The Android operating system creates temporary files to speed up the loading of frequently used programs. Over time, these files grow, taking up gigabytes of usable volume. Standard cleaning through the smartphone menu often affects only the surface layer, leaving deep deposits of debris untouched. Full cleaning requires manual access to the storage of each heavy application.

⚠️ Note: When cleaning application data through settings (Settings) → Annexes → All applications → [Select an application] → Memory. → Clear) you may lose your correspondence history or login credentials if you do not make a backup copy.

Special attention should be paid to the Android/data folder, which in recent versions of MIUI has become hidden for security, which stores cached videos from social networks and gaming resources, cleaning this section often frees up to 5-10 GB of space, which is formally listed as “occupied with other files”.

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Use Xiaomi’s built-in Security app, but for deep cleaning, it’s best to use a file manager with access to system folders, such as Total Commander or Files by Google.

Hidden folders and residual files after deletion

When you delete an application in the standard way, it often leaves its configuration files and error logs in the system. These tails may weigh a little, but in the aggregate, over the years of using a smartphone, they form a solid volume. In addition, many programs create hidden folders at the root of internal memory that are not visible in the usual gallery.

For example, photo and video editors create previews that are not deleted with the source code. Browsers save offline maps and downloaded pages. To find these files, you need to enable the display of hidden objects in the file manager. This is usually done through the Explorer settings menu, where you need to activate Show Hidden Files.

It’s also worth checking the MIUI/Gallery/cloud/cache folder, where remote cloud photos can be stored. If you’re syncing, make sure the originals are actually uploaded to the cloud and removed from the device, rather than just moved to the local cart.

• 📂 Check the Download folder for old installation files APK.
• 🗑️ Clean the Recycle Bin in the Gallery and File Manager, as deleted files are stored there for 30 days.
• 📱 Analyze the messenger folders (WhatsApp/Media, Telegram/Android) Availability of automatically uploaded videos.

The “Other” section: what is stored there and how to clean

Xiaomi’s interface often features a mysterious “Other” category that can take up the lion’s share of memory, which hides data that the system cannot classify as media, applications or documents, including system update files, game data, card cache, and encrypted databases.

Often, this section includes files left over from a failed firmware update or file system failures, and can store debugging logs that are created if the phone has ever been enabled by developer mode. Cleaning this section requires caution, as deleting system files can lead to unstable smartphone operation.

To safely clean the Other partition, it is recommended to use the built-in memory optimization feature that is available in the storage menu, the system itself will suggest removing unused data packets. If this does not help, you can try to clean the System partition cache using Recovery Mode, but this requires certain technical skills.

The impact of messengers and social networks on memory

Messengers are the main memory eaters on a modern smartphone. Telegram and Viber by default store all viewed media files in internal memory. Even if you deleted the chat, media files can remain in the app's cache, continuing to take up space.

Each messenger has an automatic cache cleaner feature, such as Telegram, which allows you to set a limit on cache space or autodelete files over a certain period of time, and ignoring these settings can take up 10-20 GB of storage, even though the useful weight of the correspondence is only a few megabytes.

Also worth paying attention to are WhatsApp statuses and Instagram stories, which are stored in hidden folders, and cleaning those folders regularly through the file manager allows you to maintain order without losing important email data.

⚠️ Before clearing the data of messengers, be sure to back up chats in the cloud storage (Google Drive or your own messenger cloud) so as not to lose the message history.

Duplicate files and file system errors

When you use your smartphone, move data from your computer, or reset your settings, you may experience duplicate files, the system may consider them unique objects, even though they actually take up space twice, and file system errors may also result in deleted files not being labeled as free space.

There are special utilities for finding duplicates, but you can also use the built-in MIUI tools. The Files app has a feature for finding large and repeating files. It is also useful to check the Bluetooth folder, which often automatically stores the received files that the user forgets about.

If you suspect a file system error, you can do disk checks. On computers, this is done via chkdsk, and on Android, there are similar tools in the Recovery menu or through the Recovery menu. ADB-However, for the average user, it is safer to perform a complete reset of the data formatting settings, saving important information beforehand.

Technical Analysis Methods: ADB and Developer Mode

For advanced users who want to know exactly what's taking up space, there are debugging tools. By connecting the phone to a computer and installing the Android Debug Bridge (ADB), you can get detailed statistics on disk usage. The adb shell dumpsys diskstats team will output a detailed report on partition occupation.

Also in developer mode (Settings → About Phone → 7 times click on the MIUI version), you can turn on logging memory usage, but this is more suitable for diagnosing specific applications.

adb shell pm list packages -f | grep "path to heavy application"

This method allows you to find hidden processes and services that consume resources. However, using ADB requires caution: an incorrect command can lead to the removal of system components. Before starting work, make sure you understand the meaning of the instructions you enter.

Table: Distribution of file types in Xiaomi memory

Below is a table showing the typical distribution of data in a smartphone’s memory after active use over the course of a year.The numbers can vary depending on the model and user habits.

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The system partition and the data partition are separated, so deleting user files does not reduce the amount of time the operating system itself and its updates take up.

FAQ: Frequently Asked Questions