Redmi Note smartphones, including the popular Redmi Note 9 Pro, are slowing down over time and the internal memory is flooded with obscure files. It’s a natural process of accumulating temporary data that the MIUI operating system saves to speed up program launches. However, when the volume of this data becomes critical, the user faces interface friezes, spontaneous closure of applications and a lack of space for new photos.
Cache cleanup is a safe and effective procedure that returns the device to its former sharpness. Unlike deleting personal files, resetting temporary data does not affect your contacts, correspondence or installed games. Proper maintenance of the data storage system allows you to extend the life of flash memory and avoid situations where the phone simply stops responding to commands due to overflow of system partitions.
Xiaomi owners need to understand the difference between cleaning and removing the excess. We will look at all available methods, from built-in tools "Security" to deep cleaning through the engineering menu and Recovery. Competent approach to maintenance of the gadget ensures its stable operation throughout the life cycle of the device.
Why you need to clean the cache on the Redmi Note 9 Pro
Cache serves as a buffer for storing frequently used application data. When you open a social network or browser, the system stores some of the images and scripts so that the next time the page loads instantly. Over time, these files become irrelevant, but continue to take up precious gigabytes on the disk. If you do not clean regularly, system debris can take up to 10-15 GB of memory.
The main problem with the accumulation of temporary files is fragmentation of data and version conflicts. Old libraries can interfere with the work of updated applications, causing errors in the operation of MIUI. This is especially true for heavy programs like video editors or navigators, which generate a huge number of temporary files during operation.
⚠️ Cache clearing does not delete your logins and passwords, but may require re-authorization in some applications, as session data is also stored in temporary files.
Regular maintenance helps reduce the workload of the processor when reading data. When memory is scarce, the system has to spend more resources finding free space to write new temporary files, which directly affects the autonomy of the device.
Use of the built-in "Security" application
The easiest and safest way to clean up garbage on the Redmi Note 9 Pro is to use the standard tools of the MIUI shell. Xiaomi engineers have provided a special module that automatically scans the file system for temporary files, remnants of remote programs and advertising debris.
To start the procedure, look for an icon on your desktop called “Security” (green shield). Select Cleanup within the menu. The system will quickly analyze and prompt you to delete files that do not affect the operation of personal data. Clicking the “Clean” button will start the process of removing selected objects.
☑️ Quick cleaning algorithm
It's important to note that standard cleaning doesn't always remove the cache of heavy applications completely. To get deeper, you need to go to the Memory section of your phone settings. Here you can see detailed statistics on occupied space. By clicking on the "Other" or "System Files" category, you can see which processes occupy the most space.
Accelerate in the same application helps to free up RAM by closing the background processes. Although this does not clean the storage directly, a comprehensive approach gives the best result. Regular use of these tools prevents critical overflow of the disk.
Cleaning the cache of individual applications manually
If a particular application, such as Telegram or YouTube, is not working properly or takes up an abnormally large amount of space, it is better to force the cache through the settings, which allows you to point-to-point delete temporary data without affecting the main database of the program, such as correspondence or saved playlists.
Go to the Settings menu, then select the App and click All Apps. In the list that opens, find the program you want. In the app information window that opens, click the Memory (or Storage) button. Here you will see two buttons: Clear cache and Clear everything.
- 📱 Cache Clearing: Deletes temporary files, thumbnails, and downloaded scripts without affecting your settings and accounts.
- 🗑️ Cleaning All (Data): Resets the application completely to the state immediately after installation, removing logins, saves and personalization.
- ⚙️ Permissions management: You can disable extra rights in the same menu, which sometimes helps reduce the amount of garbage generated.
Pay special attention to messengers. WhatsApp or Viber cache can grow to tens of gigabytes due to thousands of saved thumbnails of photos and videos. Clearing the cache in the settings of these applications is safe, but it is better to do this through the built-in functions of the messengers in the section “Data and storage” to have more flexible control.
⚠️ Warning: Do not click on Clear Data if you want to save your correspondence history and settings within a particular application.
Deep cleaning through the Recovery menu
For advanced users who have experienced serious disruptions in the Redmi Note 9 Pro, cache clearing via Recovery Mode is available, a method that allows you to delete temporary files of the system update partition, which often solves problems with the “boot” (cyclic reboot) after a firmware update.
To get into this menu, you have to turn off your smartphone 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, keep the volume up. When the Recovery menu comes up, use the volume buttons for navigation and the power button for selection.
What to do if the menu does not appear?
From the menu, select Wipe Data, then Wipe Cache. Note that newer versions of MIUI with data protection may require you to enter a pattern lock or unlock the screen password. If you forget your password, you can't clear the cache without completely resetting it.
This is the most effective method for troubleshooting errors after failed system updates. It does not affect user files, photos and contacts, working exclusively with the Cache Partition system partition. Once you have completed the procedure, select Reboot to restart.
Cleaning automation and useful widgets
Xiaomi owners have an automatic cleaning feature that eliminates the need to manually run checks every day. In the Security app, you can configure the automatic start of the cleanup when you reach a certain memory occupancy threshold.
You can also put a "Clean up" or "Clean up" widget on your desktop, which allows you to free up RAM with a single touch and remove any accumulated debris. For clean-up enthusiasts, it is recommended to set a clean-up schedule in the security application settings by selecting "Schedule".
Using cloud services like Google Photos or Mi Cloud also helps to free up space. Google Photos’ “Free up space” automatically removes images and videos that have already been successfully uploaded to the cloud from the device, reducing the load on internal storage without losing data.
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Use the “Cache Clear” feature in the Google Play Store settings if you have problems downloading or updating apps. This often resolves download errors.
Comparison of System Cleaning Methods
The choice of cleaning method depends on your goal: prevention, treatment of a specific problem or freeing up the maximum amount of space. Below is a table that will help you navigate the effectiveness of various methods for the Redmi Note 9 Pro model.
| Cleaning method | Security of data | Efficiency | Difficulty |
|---|---|---|---|
| Security annex | Tall. | Medium | Low. |
| Manual cleaning of applications | Medium (risk of resetting) | High (for specific programs) | Medium |
| Recovery Mode (Wipe Cache) | High (systemic level) | High (for the system) | Tall. |
| Third-party utilities (Clean Master, etc.) | Low (risk of advertising and viruses) | Medium | Low. |
Using third-party software-cliner apps often does more harm than good, and can aggressively shut down system processes, forcing MIUI to waste additional energy restarting them.
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The safest and most effective way for the average user is to use the regular “Security” application in combination with manual cleaning of the cache of heavy messengers.