Owners of the popular Redmi Note 9 Pro often experience slowdowns or lack of free space some time after purchase, a natural process as the Android operating system and MIUI shell accumulate temporary files to quickly load applications. However, over time, this data ceases to be useful and begins to take up precious gigabytes of internal memory.
Regular maintenance of the device allows you to maintain its performance at a high level. If your smartphone has started to work slower, hang out in games or open heavy applications for a long time, then the first thing to pay attention to cleaning up system debris. In this article, we will discuss in detail all available methods for deleting temporary files without losing personal data.
Understanding how caching works will help you manage your gadget’s resources more effectively, saving thumbnails of images, temporary browser files and update data so that you don’t waste CPU traffic and time when you re-access them, but when the size of these files becomes excessive, the benefits turn into harm, slowing down Xiaomi.
What is cache and why you need to clean it
Cache is a memory area of a device that stores temporary data from frequently used programs. When you open an application for the first time, the system downloads all the necessary resources from the disk. When you restart Android takes some of the information from the cache, which greatly speeds up the process.
But there's a downside to this mechanism: Files can get corrupted or conflict with new versions of programs, for example, after a social network update, old temporary data can cause errors or "outages," which is where manual cleaning is required.
Effect of cache on battery
In addition, freeing up disk space has a positive effect on overall system stability: When the Redmi Note 9 Pro drive has less than 10% of free space, the speed of writing and reading data decreases, regular garbage removal prevents critical memory filling and prolongs the life of the drive.
Cleaning the cache through the standard Security app
The easiest and safest way to remove temporary files on Xiaomi is to use a built-in tool, which analyzes the system’s status and suggests removing unnecessary debris, which is the best option for users who do not want to go into complex settings.
To get started, look for an icon on your desktop or in the Tools folder called Security. Launch the app and wait for the automatic scan to complete. The system will determine the amount of accumulated debris, including app cache, remnants of remote programs and advertising files.
After analysis, a Clean button will appear on the screen, and clicking on it will trigger the process of deleting temporary data. It is important to note that this method will not affect your personal photos, contacts or correspondence in messengers. Only those files that the system considers safe to delete are deleted.
☑️ Checking before cleaning
Keep in mind that standard cleaning doesn’t always remove the cache of all apps completely.Some programs, such as YouTube or Telegram, can store a significant portion of the data in hidden folders that the standard scanner ignores.
Manually cleaning the cache of individual applications
If a particular application is not working properly or takes up too much space, the cache can be cleared individually, a more point-based approach that allows you to free up space without touching the data of other programs, and often it is the cache of social networks or browsers that grows to several gigabytes.
To do this, go to Settings for your Redmi Note 9 Pro. Find the App and select All Apps. In the list that opens, find the program you want, like Instagram or Chrome, and click on it.
In the app menu, select Memory or Storage, and you'll see two buttons: Clear cache and Clear everything. Be careful: the first button only deletes temporary files, and the second button resets the app to the state immediately after installation, removing logins and settings.
- 📱 Social media: Most often takes up the most space due to saved images and videos.
- 🌐 Browsers: Page cache can weigh hundreds of megabytes, especially if you frequent heavy sites.
- 🎮 Games: Temporary shader and map files can significantly slow down level loading.
- 🛒 Marketplaces: Product catalogs and images are often stored in memory for quick access.
💡
Use the “Sort by Size” feature in the app list to quickly find the programs that occupy the most space on your Redmi Note 9 Pro.
It is recommended to check the list of the most "heavy" applications periodically, sometimes it happens that a program that you rarely use may have an inflated cache due to background processes or errors in the developer's code.
Remove the system cache through the Recovery menu
For more advanced users, there is a possibility of cleaning the system partition cache (Dalvik/ART Cache), which is especially useful if after updating the MIUI firmware, the phone starts to work unstable or quickly discharge, this procedure is secure and does not delete personal data.
To enter recovery mode, turn off the smartphone completely. Then press the volume button and the power button at the same time. Hold them until the Redmi logo appears, then release the power button, but keep the volume up until the Main Menu menu appears.
In the menu, you can navigate with volume buttons (up/down), and the choice is confirmed by the power button. Select Wipe Data, then Wipe Cache. Don't confuse this with Wipe All Data, which completely wipes your phone!
⚠️ Note: In the Recovery menu, select items carefully. the option of Wipe All Data or Format Data will lead to a complete reset of the smartphone to the factory settings with the removal of all photos and contacts.
Once you select the cache clearing command, the system will request confirmation. Select Confirm and wait for the process to end. Once completed, press Back to Main Menu and select Reboot to restart the device. The first run may take longer than usual.
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Cleaning the system cache through Recovery is an effective way to resolve performance issues after major Android or MIUI updates without losing personal files.
Comparison of cleaning methods: table
To make it easier for you to choose the right way to service the Xiaomi Redmi Note 9 Pro, we have prepared a comparison table that will help you assess the risks and effectiveness of each method depending on your situation.
| Cleaning method | Security of data | Efficiency | Difficulty |
|---|---|---|---|
| Security Annex | Tall. | Medium | Low. |
| Application settings | High (for cache) | Tall. | Medium |
| Recovery menu | High (if not confused) | Very high. | Tall. |
| Third-party utilities | Medium | Medium | Low. |
As you can see from the table, standard Android tools provide the best balance between security and results. Using the Recovery menu gives the maximum effect, but requires caution. Third-party software-cleaners often only create the appearance of work, consuming resources themselves.
Choose the method depending on the problem. You need a built-in scanner for daily care, and if you have serious system failures, you should resort to more radical but effective measures through the recovery menu.
Use of third-party clearing-house applications
There are thousands of apps available on the Google Play store to speed up your phone, but Redmi Note 9 Pro owners should be careful, because the built-in MIUI optimization is already aggressive enough that additional programs can conflict with the system.
Some popular cliners are really useful if used correctly, they can find duplicate files, remnants of deleted applications and empty folders, but many contain aggressive advertising or impose paid subscriptions.
If you do decide to install such a program, choose proven solutions from well-known developers such as Files by Google. This application safely analyzes the storage and suggests removing the really unnecessary without interfering with system processes.
- 🚫 Avoid apps that promise to “accelerate the game by 200%” – this is a marketing ploy.
- ✅ Use only those programs that have a high rating and a lot of reviews.
- ⚙️ Check the permissions that the cliner requests when installing.
⚠️ Note: Avoid installing "accelerators" RAM», In modern versions of Android, this only leads to increased battery consumption and more frequent restarts of applications.
Remember, no third-party program works wonders. If a phone has little free memory or its processor can't handle modern tasks, software cleaning will only have a temporary and insignificant effect.
Prevention and useful service advice
To keep your Xiaomi up to speed for as long as possible, it's important not only to clean the cache, but also to follow certain rules of operation. Regularity is key. Don't wait for the phone to start choking from a lack of resources.
One of the best tips is to set up automatic cleaning in the Security app, go to the settings of this app and activate the Clean Auto function, and the system will remove garbage itself when you are not using your phone, for example, at night.
Also keep an eye out for system updates. Newer versions of MIUI often come with patches that fix memory management errors. Go to Settings → About the phone and check for updates. If the version is current but problems persist, it may be worth resetting to factory settings.
The myth of total detente
Use cloud storage for photos and videos. Xiaomi's built-in gallery can sync with the cloud, which will free up the device's local memory by transferring heavy media files to the server, and access to them at any time with the Internet.