Xiaomi Deep Cleanup: What It Is and When You Need It

Owners of Xiaomi smartphones sooner or later face a situation where the device starts to work slower, and notifications of space shortages appear more often.The built-in Cleanup tool offers to solve the problem with a single click, but often users do not understand the difference between conventional garbage removal and deep cleaning. Many fear that after the procedure, important photos or contacts will disappear, so they ignore the system's offer.

In fact, deep cleaning on Xiaomi does not affect personal media files unless the user chooses the appropriate options, it is a powerful system maintenance mechanism that removes the remnants of deleted applications, temporary update files and cache that has grown to inadequate size. Understanding the principles of this tool allows you to free up gigabytes of space and return the phone to its previous sharpness.

In this article, we will discuss in detail what files the system deletes, how dangerous this feature is if used improperly, and how to conduct the procedure as efficiently as possible. You will learn why the standard Clear clicker does not always help and in which cases manual intervention into the file system through the security menu is required.

The essence of the deep cleaning function in MIUI

The standard Security app, preinstalled on all Redmi and Poco smartphones, has multiple memory layers. Conventional cleaning scans only surface cache and obvious debris. Deep cleaning is a more aggressive algorithm that analyzes the structure of application folders, looks for error logs, remnants of deleted programs, and temporary files created while the system was running.

The main purpose of this feature is not just to make room, but also to optimize the operation of the operating system. When many small fragmented files accumulate in memory, it takes the processor longer to process or ignore them, removing this “digital noise” often solves the problem of interface hanging better than restarting.

It's important to understand that MIUI algorithms are quite conservative in the baseline mode, they don't delete data without user confirmation if it's marked as important, but in deep scan mode, the system may suggest removing the messenger cache, which will result in logging out or loss of temporary correspondence files.

What files are deleted and what remains

When you start a deep cleanup, the system audits several key directories, primarily the temporary files with the.tmp extension and application logs, which is safe because this data is created for the current session and has no value after you restart programs.

The app cache deserves special attention, which is data that speeds up the launch of programs (for example, image previews in a gallery or uploaded posts on social networks), and its deletion frees up a lot of space, but the next time it logs into the application, it will load a little longer until it forms a new cache.

Below is a table showing which data types are being cleaned and which remain intact under the standard scenario:

The user always sees a detailed list of what will be deleted before confirming the action, which avoids accidentally losing important information if you read the file descriptions carefully.

Instructions: How to start a deep cleaning

The deep cleaning procedure on Xiaomi smartphones is as simple as possible, but has its own nuances depending on the version of the shell. First, you need to open the Security app.

On the home screen of the app, click the Clean button. After completing the initial analysis, which takes a few seconds, the Clean button will appear at the bottom of the screen. Don't rush to click on it right away. Notice the additional sections below, such as Large Files, Unused Apps, or Duplicates.

To access more detailed analysis, you often need to go to the Memory section in your phone settings or select Deep Clean (if available in your version of MIUI). In some regions, the interface may differ, but the logic remains the same: the system suggests removing what takes up the most space and is not critical to work.

If the automatic analysis didn't find much debris, you can use manual mode. Go to Settings → About Phone → Storage. Here you can take a detailed look at what exactly takes up space and clean the cache of specific applications manually, which is sometimes more effective than automatic cleaning.

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Use the “Accelerate” function before cleaning – it will close the background processes, which will allow the system to better determine which cache files can be safely deleted.

Risks and precautions

Despite the safety of the procedure, there are scenarios where automatic cleaning can be a inconvenience, the main risk is the cache of messengers such as Telegram or WhatsApp, these applications store the history of media files in cache, if you delete them, the history of correspondence will remain, but old photos and videos will have to be re-uploaded from the cloud or they will be unavailable.

⚠️ Before clearing the messenger cache, make sure you have access to the internet to re-download the history, or back up the chats inside the app itself.

Another risk is deleting offline navigation files or music from streaming services, and apps like Yandex.Music or Spotify can store downloaded tracks in folders that the system identifies as cache, and carefully check which apps are ticked before final confirmation.

You should also be careful about "big files." Often the system suggests that you delete old videos or game installation files. Make sure that these are not your personal archives. The automatic analyzer does not always understand the context of the file, it only sees its size and type.

Storage analysis: search for hidden debris

Sometimes, standard deep cleaning doesn't show the actual amount of space occupied, because it's hidden folders or system logs that aren't classified as garbage, and for those cases, MIUI has a built-in storage analyzer.

Go to Settings → Memory. Here you'll see a color diagram of the data distribution. If you click on "Other" or "System Files," you can see what exactly takes up gigabytes. Often there are Android/data folders where applications store their data.

Cleaning this partition requires caution, deleting the folder of a particular application can lead to loss of progress in games or program settings, however, if you delete an application but its folder remains and takes up space, this is a legitimate candidate for removal.

For advanced users, there is the option of using a command via ADB to clear the cache of all users at once, but this requires a PC connection and is not recommended for ordinary users due to the risk of system disruption.

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Regular deep cleaning every 2-3 months is more useful than daily, and frequent deletion of the cache causes the system and applications to spend more energy on re-creating it, which can reduce autonomy.

Alternative methods of vacating space

Even if deep cleaning didn’t work, other optimization methods are worth considering: oftentimes, user-generated content is not the system files, and moving photos and videos to cloud services like Google Photos or Yandex.Disk allows you to free up local memory by leaving media access over the Internet.

Also effective is removing unused applications, and there's an Application Management section on the Security menu that shows you when you last started a program, and if you haven't opened an app for more than a month, you can remove it.

Another method is to clean the Download folder, where browsers and instant messengers often store all open documents, presentations and pictures, which is rarely cleaned automatically and can grow to tens of gigabytes.

⚠️ Note: When manually cleaning folders through a file manager, never delete files with unknown extensions from system directories unless you are sure of their purpose.

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