How to Clean Memory on Xiaomi: From Cache to System Files

Modern Xiaomi, Redmi and Poco smartphones have powerful hardware, but even flagship models are beginning to suffer from a lack of space over time. The user notices that apps open longer, the camera runs with delays, and the system periodically issues notifications about overflowing storage. It is a natural process of accumulation of digital garbage that requires regular intervention.

The main reason for the lack of space lies not so much in installed games, but in the sprawling cache of messengers, residual files of remote programs and duplicate photos. The MIUI or HyperOS shell has built-in tools for maintenance, but they do not always cope with deep cleaning. Understanding the structure of the Android file system will allow you to free up gigabytes of valuable space without losing important data.

In this article, we will explore not only standard methods, but also hidden features of the system that are often ignored. You will learn which folders can be deleted painlessly, how to optimize the operation of cloud services, and why memory overflow affects charging speed and processor performance. A competent approach to file management will prolong the life of your device.

Analysis of the storage occupancy of built-in tools

The first step is always to diagnose, and you don't blindly delete files without understanding what's taking up space, and there's a great tool in the MIUI shell called Cleanup that gives you a basic idea of the situation, but for deep analysis, you'd better use the settings menu, where you're presented with more detail and categorized information.

Go to Settings → Memory (or Storage) and it will show you a pie chart of the distribution of data. Notice the Other section, which is often where heavy files are hidden that the system cannot automatically classify. Clicking on any category will show you a list of applications or file types sorted by volume.

⚠️ Note: Do not delete files from Android system folders and MIUI through the file manager if you are not 100% sure of their purpose, this can lead to incorrect interface operation or cyclical restart of the device.

For more advanced analysis, you can use the adb shell dumpsys diskstats command by connecting your phone to your computer, but for most users, visual analysis in the settings is enough. It is important to distinguish the size of the application from the size of its data: the program itself can weigh 100 MB, and its cache and downloaded files can take up 5 GB.

Clearing the cache and data messengers

Memory consumption leaders are traditionally Telegram, WhatsApp and Viber, which store every photo, video and voice message viewed into local memory, and over time, folders with media files can grow to tens of gigabytes, turning a smartphone into a sluggish device.

In Telegram, the cleanup is done most securely through the built-in settings. Go to Settings → Data and Memory → Memory Use. Here you will see the Cached Data slider. By clicking Clear Cache, you will delete temporary files, but the correspondence history and important documents will remain on the server and download again as needed. This is a secure procedure that does not delete your chats.

WhatsApp is more complicated because it stores all media locally. To clean up, go to Settings → Data & Storage → Storage Management. Here you can select the chats that take up the most space and delete large files selectively. It’s also worth turning off autosave to the gallery so that media files don’t duplicate in the DCIM system folder.

• 🗑️ Regularly check the Downloads folder in the file manager – installations often accumulate there. APK-files and temporary documents.
• 📸 Turn off autosave storis from Instagram and Facebook to the phone gallery if such a feature is active in app settings.
• 📂 Use the Archivation feature in instant messengers to transfer old dialogs to your computer or external drive before removing them from your phone.

After cleaning the messenger cache, it is recommended to restart the device, which will allow the system to re-index the files and correctly display the freed space in the settings menu.

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Turn on the “Cache Autodelete” function in Telegram: select a period (for example, 3 days), and the application will delete old temporary files by itself, freeing up space without your participation.

Work with Gallery and Cloud Services

Photos and video are the second-most serious “load” that pulls the smartphone’s memory to the bottom. Modern cameras shoot in high resolution, and one minute of video in 4K can take up to 400 MB. Store thousands of such files on the built-in store is irrational.

The best solution is to use cloud services. Xiaomi has a Mi Cloud built into the ecosystem that allows you to sync the gallery. When synchronization is enabled, the original photos can be stored in the cloud, and the device can remain smaller copies of them. To access full quality, just click on the image. Similarly, Google Photos and Yandex.Disk work.

Before deleting a photo, be sure to check the folder “Recently deleted.” In MIUI and Android, deleted files are stored there for another 30 days, continuing to take up space. Cleaning this basket gives instant results. It is also worth checking the Screenshot folder and the Recorder folder, which are often forgotten by the user.

If you don’t want to use the cloud, consider migrating your archive to a computer or externally. SSD-storage OTG-Regularly transferring old video files to an external medium is the best prevention of memory loss.

Removal of system debris and residual files

When you delete applications in Android, you often have tails — empty folders, error logs, and temporary configuration files — that aren’t critical to the system, but they run into the thousands, slowing down the file system, and there are special tools to deal with them.

Xiaomi’s standard “Security” app (green zipper icon) has a “Cleanup” module that finds cache, residual files and large files. However, for deeper cleaning, you can use proven third-party solutions like Files by Google or SD Maid. They can find duplicate files and empty directories.

You should pay special attention to the Download folder, where browsers and social networks save everything you've ever downloaded. Sort files by size and date. Often you can find forgotten game installers, PDF-document APK-Update files that are no longer needed.

⚠️ Warning: When using third-party cleaners, avoid aggressive registry or system file cleaner modes. On Android, this often leads to app crashes rather than speeding up.

Also worth checking is the Android/data folder. You could go through any file manager before, but newer versions of Android have limited access. To clear the cache of specific applications, you should use the Settings menu → Apps → All Apps → [Select App] → Clear the cache.

Managing applications and updates

Many users install apps just in case or forget to remove games they have stopped playing, each application can run in the background, consume resources and take up space, and revision of installed software is an important step in optimization.

Go to Settings → Apps → All Apps. Sort the list by size. You'll be surprised to find that some old photo editing app takes 2GB. Boldly remove what you haven't used for more than a month. For system applications that can't be removed, the "Disable" feature is available, which hides the application and stops its processes.

Another source of garbage is automatic app updates via Google Play and Mi GetApps. Sometimes the system stores multiple versions of installation files. In the settings of the app stores, you can turn off auto-save installers or configure to clean the store cache.

• 📱 Remove unused widgets and live wallpaper – they not only take up space, but also consume battery power.
• 🔄 Turn off auto-update heavy games if you’re not playing them right now so they don’t take up space with new resources.
• 🚫 Avoid installing “Lite” versions of apps if you have enough memory, as they often contain more ads and are less optimized than the full versions.

Remember, if you cloned WhatsApp or Facebook, the second one takes up as much space as the main one, and see if you need a second one.

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Removing a single heavy application (such as a 3GB game) is more effective than cleaning hundreds of small caches that take up 10MB each.

Radical measures: resetting and formatting

If the software methods don't work and the memory fills up instantly, it may be that the problem is file system logic errors or accumulated system debris that can't be removed by regular means, in which case a complete reset helps.

Resetting to factory settings (Settings → Phone → Reset → Erase all data) will return the phone to a store-like state, guaranteed to free up space and speed up work, but make sure to back up your data to your computer or the cloud before doing so.

There's also a less radical method, which is to clean the Dalvik Cache section through the Recovery menu, turn off the phone, press the button combination (usually Volume Up + Power), and select Wipe Cache, which is safe for personal data, but can take a few minutes.

In rare cases, the storage wear is the cause of space shortage, and if the empty space disappears by itself immediately after cleaning, it may be that the phone's flash memory has degraded and stopped recording data correctly, and in such a situation, software cleaning will not help, you will need to replace the memory module in the service center.