Smartphones series Redmi from Xiaomi are famous for excellent price-performance ratio, but even powerful hardware over time requires maintenance. Model Redmi 9 Pro was no exception: despite decent characteristics, the accumulation of temporary files can lead to a noticeable decrease in the performance of the MIUI. Users often face a situation when the phone begins to “slow down” when switching between applications or open heavy programs for a long time.
The main reason for these problems is the sprawling cache of applications and system debris that accumulates in the background. Cleaning up this data is not just a way to free up a couple of gigabytes, but a necessary preventive measure for the stable operation of the Android operating system. In this article, we will discuss in detail all available methods for deleting temporary files, from standard tools to hidden developer menus.
It is important to understand that regular maintenance of the file system allows you to extend the life of the drive and keep the device running smoothly throughout the entire period of operation. We will consider safe ways that do not require root rights and will not lead to the loss of personal photos or contacts. Deleting the cache does not affect your personal data, logins and passwords, while maintaining complete confidentiality of information.
What is cache and why should it be cleaned on Redmi 9 Pro
Cache is a memory area where temporary files created by apps to speed up their work are stored. When you launch YouTube, Instagram or a browser, they store interface elements, images and scripts so that they can be downloaded instantly the next time they open, without accessing the Internet again. However, over time, this data can conflict, become outdated or take up a critically large amount, which is especially true for models with limited built-in storage.
On the Xiaomi Redmi 9 Pro, a crowded cache can cause not only space shortages, but also software failures. For example, an application can stop launching, fly out immediately after opening, or display incorrect information. MIUI has built-in memory management mechanisms, but they are not always effective against heavy users who actively use social networks and instant messengers.
Regular cleaning eliminates errors in the code of temporary files and returns the system to a sense of “freshness”, especially after major firmware updates or installing new versions of popular applications that often change the structure of their data, and ignoring this procedure can lead to the fact that even a powerful Snapdragon processor can not compensate for the slow operation of a disk filled with garbage.
Use of the built-in "Security" application
The easiest and safest way to clear the Redmi 9 Pro cache is to use a standard system tool. Xiaomi preinstalles the Security app, which combines the functions of an antivirus and a memory optimizer, which is ideal for most users, since it eliminates the risk of deleting important system files.
To get started, you need to find an icon on your desktop called Security (often has a green shield as your logo). Once you run the application, the system will automatically scan, but for deep cleaning, you need to select a specific tool.
The system will analyze the amount of garbage it occupies and suggest that you delete files. However, standard cleaning often removes only obvious debris. For more careful work, click on the Clean up button in the "Junk" section, and then wait until the process is complete. If you want to select files manually, go to the "Manage" section within the application.
☑️ Checklist for quick cleaning
It is important to note that the built-in tool is sometimes too conservative and does not remove the cache of some Google or MIUI system services. In such cases, manual intervention is required through the settings of a particular application. It is also worth considering that after cleaning the cache, the first opening of heavy applications (for example, a navigator) can take a little longer, since the data will be downloaded again.
⚠️ Warning: Do not use third-party accelerator apps from the Play Market on a regular basis.They often put additional workload on the processor and may contain aggressive advertising, which will negatively affect the autonomy of the Redmi 9 Pro.
Manually cleaning the cache of individual applications
If a memory problem is a problem with a particular program, like Telegram or TikTok, it's more effective to clear its data individually, and these apps tend to accumulate gigabytes of watched videos and images that aren't always deleted by standard cleaning, and manually control what is being deleted.
Go to your smartphone Settings menu and find the Apps section. From the list of all installed programs, select the app you want (like YouTube). From the control menu that opens, look for Memory or Storage, and you'll see two main buttons: Clear cache and Clear everything.
Click Clear Cache. This operation is secure and will only delete temporary files. If you choose Clear Everything (or Reset), the application will return to state immediately after installation, and you will have to re-enter your logins and passwords. Be careful when choosing the action so that you do not lose your authorization data.
For some applications, such as instant messengers, cache cleaning can be done through the internal settings of the program itself. For example, on Telegram, the path looks like: Settings → Data and memory → Memory Use → Clear cache. This method is often more effective, since it allows you to choose the period of storage of media files (for example, leave the cache only for the last 3 days).
Why is the cache growing so fast?
Deep cleaning through the “Storage” menu
There is a separate section on disk space management in the MIUI shell that gives a more detailed picture of memory occupancy, where you can see which file types take up the most space. Go to Settings → About Phone → Storage (or just Settings → Storage depending on the version of MIUI).
In this section, the system visualizes data by category: apps, images, videos, documents, etc. By clicking on the App category, you can sort it by the size of the cache you occupy, and it's a convenient way to find hidden memory eaters that you might not have known about.
The system will also suggest clearing "Other" - often system debris and remnants of remote programs. Be careful with this category: automatic cleaning here is safe, but manual disassembly can result in the removal of important configuration files if you are not sure about the purpose of the folders.
| Type of data | Description | Is it safe to remove? |
|---|---|---|
| Cash app. | Temporary files to speed up work | Yes, it's completely safe. |
| Residual files | Files from remote programs | Yes, we can remove. |
| APK packages | Application installation files | Yes, if the app is installed |
| Unknown files | Files with incomprehensible extension | Be careful, it's best to check. |
| Large files | Videos, archives, uploaded documents | Only if you don't need them. |
Using this partition helps keep the Xiaomi Redmi 9 Pro file system in order on a long-term basis, and regular monitoring allows you to notice abnormally fast memory growth in any one application in time and take action.
Cleaning the cache through Recovery mode
For advanced users, there is a method of cleaning the system cache (Dalvik/ART Cache) through Recovery mode, which is useful if the phone is unstable, freezes or glitches are observed after a system update, and it clears the cache of the operating system itself, rather than individual applications.
To enter Recovery mode on the Redmi 9 Pro, you need to turn the device off completely. Then press the volume button and the power button at the same time. Hold them until the Mi logo appears, then release the power button, while keeping the volume high. The main Recovery menu opens.
Navigation in this menu is done with volume buttons (up/down), and the choice is confirmed by the power button. Find Wipe Data. Inside this menu, select the Wipe Cache option. Importantly, don't confuse this with the Wipe All Data option, which will completely reset the phone to factory settings with all files lost.
⚠️ Warning: In Recovery mode, touch screen control may not work. All actions are performed with strictly mechanical volume and on buttons. Do not interrupt the cleaning process until the screen shows a message about the successful completion of the process.
Once confirmed, the system will clear the service caches, which can take anywhere from 30 seconds to several minutes. Once the process is complete, select Reboot to return to normal operation. The first on-line after the procedure may last longer than usual, which is the normal system response to clearing the compiler cache.
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If the phone is stuck on the Mi logo after cleaning the cache in Recovery, try a full reboot by holding the power button for 15-20 seconds. 95% of the time, this solves the problem.
Frequent questions and problems with cleaning
Despite the simplicity of the procedure, Xiaomi users often have questions related to the features of the MIUI shell and the specifics of Android. Below are answers to the most popular questions that will help avoid typical mistakes.
Many users worry that clearing the cache will remove their correspondence or game progress. As mentioned, the cache is temporary. However, in some rare cases (such as cached games without cloud storage), progress can be lost if the developer has not implemented data storage correctly.
Another common question is, "How often do you need to clean the cache?" In modern versions of Android and MIUI, there is no strict need to do this daily, just perform the procedure every 1-2 months or if there are signs of memory shortage. Excessive cleaning (every day) can even reduce performance, as the system will have to recreate temporary files.
Will my photo gallery be deleted when clearing the cache?
Why does the cache fill up quickly after cleaning?
Can I clear the cache of the system application "Settings"?
Does cleaning the cache affect battery charge?
To sum up, good cache management is key to a long and happy life for your smartphone. Use the methods described in the complex: standard cleaning for prevention, manual cleaning for heavy applications and Recovery for solving serious problems. Your Redmi 9 Pro will thank you for speed and stability.
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Regular, but not excessive, cache cleaning (every 2-4 weeks) is the optimal strategy for maintaining high performance Xiaomi Redmi 9 Pro without the risk of data loss.