Xiaomi’s Redmi 9T series has earned a reputation for being reliable and highly autonomous, but over time, even the most powerful gadgets are slowing down. The main reason for performance declines is often overcrowded system memory, where temporary application files accumulate. Cache cleaning is the first and most secure step to bring the phone back to its previous sharpness without deleting user data.
Many Android device owners mistakenly believe that to speed up work, you need to remove applications or reset settings to factory. In fact, regular maintenance of the system through the regular tools of the MIUI shell allows you to maintain the optimal state of the drive. In this article, we will discuss in detail all available cleaning methods, from simple actions through settings to using the engineering menu.
What is cache and why should it be cleaned on Redmi 9T
Cache is a buffer memory in which applications store temporary data for faster loading when relaunched, for example, the browser saves thumbnails of visited sites, and messengers save the images received so as not to download them from the Internet every time anew, but over time this data can take up gigabytes of free space, turning into digital garbage.
Compounding the problem, some MIUI programs fail to manage their cache size properly, inflating it to enormous amounts. Overloading memory causes the system to lack resources for background processes, causing interface slowdowns and long response to touch, and regular cleaning helps avoid these problems.
It's important to understand the difference between cleaning up the cache and deleting the application data. If the first option just deletes temporary files, leaving your logins and settings intact, the second completely erases the program, returning it to the "post-installing" state. Clearing the cache is safe for your personal correspondence and progress in games.
💡
Use the Cleanup function in the Security app at least once a week to keep the system on track.
Use of the built-in Security application
The MIUI shell on the Redmi 9T has powerful built-in tools to maintain the system. Security is the central node for managing performance and memory. It automatically scans the device for temporary files and prompts them to be deleted in one click.
To get started, look for a green shield icon on your desktop and run it. After an automatic scan, the system will show you how much trash you're taking in. Press Clean to delete temporary files. This is a basic method that is suitable for most users' daily use.
However, standard cleaning may not affect the deep system caches of some applications. For more detailed work, you need to go to the Cleanup in-app section, and here you will see more detailed statistics by file categories, including large files, unused applications and cache of specific programs.
☑️ Quick cleaning algorithm
⚠️ Note: Do not use third-party software from Google Play with aggressive advertising. Xiaomi built-in tools are quite enough, and third-party software often only puts additional stress on the battery.
Manually cleaning the cache of individual applications
Sometimes it happens that one particular application (e.g. Telegram, TikTok or Instagram) takes up a disproportionate amount of space, in which case the global cleanup may be ineffective, and manual intervention in the settings of a particular service is required.
Other parts of the system.
To do this, go to the Settings menu of your Redmi 9T. Find the App section, then select All Apps. In the list that opens, find the desired program, such as YouTube, and click on it to open the control card.
Inside the app card, look for a memory or storage button, and you'll see two main buttons: Clear cache and Clear everything. You need the first option. Clicking on it will instantly free up space occupied by temporary files, but save your accounts.
| Type of data | What's removed | Impact on the account | Recommended frequency |
|---|---|---|---|
| Cash. | Temporary files, thumbnails | No influence. | Once a week. |
| Data data | Logins, settings, history | Total reset | Only when you make mistakes. |
| Files. | Uploaded documents | Deletion of files | If necessary, |
| Database | Messages, game progress | Losing progress | Not recommended |
Hidden cache in the gallery
Cleaning through storage menu and analysis
Newer versions of MIUI for Redmi 9T include advanced storage analysis that visualizes (occupied) space, which helps you understand what is eating up your memory, whether it’s system cache, application cache or downloaded files.
Go to Settings → About Phone → Storage (or simply Storage in the main settings menu). The system will plot the memory allocation. Pay attention to the Other or System cache category. By clicking on these sections, you can access hidden files.
Special attention should be paid to the MIUI folder in the file manager, which often accumulates update logs and backups that are no longer relevant, and the file manager allows you to manually delete the contents of download, backup and temporary directories.
💡
Storage analyzer is the best way to find “heavy” applications that you may have forgotten about, but that consume resources in the background.
Developer Mode and ADB (for Advanced)
For users who want to get maximum control over the Xiaomi Redmi 9T system, there is the option of clearing the cache through USB debugging and ADB commands. This method requires a connection to a computer, but allows you to clean the system cache deeper than standard tools do.
First, activate the developer mode. Go to Settings → About Phone and quickly click on MIUI seven times. After the message "You became a developer" return to the main settings menu, select Additional → For developers and enable Debugging on USB.
By connecting the phone to a PC with Android SDK Platform Tools installed, you can execute a command to clear the packet cache.This is especially useful if the phone is unstable after a firmware update.
adb shell pm trim-caches 999999999999This command forcibly cuts the cache of all applications to the lowest possible value. Be careful when using the command line, as incorrect actions can lead to instability.
Once the command is executed, the phone can run a little slower the first time an application is launched until it creates a new cache.
⚠️ Attention: Use ADB-Introducing incorrect arguments can lead to the deletion of important system files or resetting of settings.
Cleaning the cache through Recovery Mode
The most radical but effective way to clean up is to use Recovery Mode, a method that clears the Dalvik/ART cache, which affects the entire operating system, rather than individual applications.
To enter this mode on Redmi 9T, you need to turn off the phone completely. Then press the Volume Up button and the Power button at the same time. Hold them until the Mi logo appears, then release the power button, continuing to keep the volume up until the Recovery menu appears.
Navigation in the menu is done with volume buttons (up/down), and the choice is confirmed by the power button. Find the Wipe Data item (be careful not to confuse with Factory Reset, if you want to save data, choose only Wipe Cache if such item is available in your version of Recovery, or use Safe Mode for diagnosis). In modern versions of MIUI, the "Wipe Cache" item is often hidden or combined, so this method is recommended only for advanced users.