Redmi Note smartphones are known for their excellent price-performance ratio, but even powerful hardware eventually begins to experience difficulties with data processing. Owners of the popular Xiaomi Redmi Note 9 model often face a sudden slowdown in the interface, long launch of applications or unexpected system freezes.
This data is stored in the background while using browsers, messengers, social networks and games. Cache cleaning is a safe and effective procedure that allows you to free up precious space and return the device to its former sharpness without losing personal photos or contacts. In this article, we will discuss in detail all the available ways to delete temporary files, from standard MIUI tools to advanced methods through the engineering menu.
Why the cache accumulates and how it affects the Redmi Note 9
Cache is a buffer memory that stores copies of frequently used data to speed up reloading. For example, when you visit a website, the browser saves images and scripts so that the next time you log in, the page opens instantly. However, over time, such files can reach several gigabytes, which is critical for models with limited built-in storage, such as 64 GB versions.
On devices running MIUI shells, caching is very active as the system seeks to optimize the operation of background processes, a problem occurs when corrupted or outdated data is stored in the cache that conflicts with new versions of applications, which can lead to errors in the operation of programs, increased battery consumption and heating of the case.
Regular cleaning helps keep Android operating system stable. It is especially important to monitor the memory status of users who actively use navigation, streaming services and heavy games. Accumulation of more than 5 GB of temporary files can reduce the speed of writing new data by 15-20%.
- 📉 Slowing down the opening of applications and menus.
- 🔋 Increased energy consumption due to background waste treatment.
- ⚠️ Errors in the work of specific programs.
- 💾 Lack of space to install system updates.
Use of the built-in "Security" application
The easiest and safest way to clear the cache on the Xiaomi Redmi Note 9 is to use a standard system tool. Xiaomi preinstalles the Security app, which combines antivirus and memory optimizer functions, which does not require third-party software installation and minimizes the risk of deleting important system files.
To start the procedure, you need to find an icon on your desktop called "Security" or "Security" and run it. After opening, select "Cleaner", which is usually represented by a broom or bin icon, and the system will automatically analyze the storage and prompt you to remove the garbage found, including the cache of applications, remnants of deleted programs and advertising files.
It is important to note that a standard scanner does not always delete the cache of all applications at once, especially if they are protected by the system. In some cases, you will need manual confirmation for each item.
☑️ Quick cleaning algorithm
Once the process is complete, the system will show a report on how many megabytes or gigabytes were released, and it is recommended that this procedure be performed regularly, at least once a week, to prevent the accumulation of a critical mass of temporary data.
Manually cleaning the cache of specific applications
Sometimes the problem is not the total amount of garbage, but the malfunction of one particular program, such as YouTube, Telegram or Instagram, in which case a global cleanup may not help, and a pinpoint intervention in the settings of the problematic software is required, which allows you to delete the data that causes the failures.
To do this, go to your smartphone settings via the menu or notification curtain. Find the Apps section and select All Apps. In the list that opens, find the program you want, click on it, and select Memory (or Storage), and you will see two buttons: Clear and Delete Data.
⚠️ Caution: Clicking the Delete button will reset the application to the initial installation state. You will lose logins, passwords, correspondence and settings within this program. Use only the Clear Cache button, which deletes only temporary files.
To mass delete the cache, you can use the sorting function. In the All Apps menu, click on the three dots in the corner of the screen and select Sort → By Size, which will quickly find memory-consumption leading apps like TikTok or browsers and clean them first.
- 📱 Go to Settings. → Annexes.
- 🔍 Find the heavy app on the list.
- 🗑️ Press "Memory» → «Clear the cache».
Cleaning through the Recovery Mode menu
For advanced users who are facing serious problems with the system, there is a method of cleaning through recovery mode (Recovery Mode), which allows you to delete temporary files at a deeper level than is possible through the Android interface.
Before starting the procedure, make sure that the battery is at least 50% so that the device does not turn off during the process. Turn off the 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, continuing to keep the volume until the Recovery menu appears.
Volume up + Nutrition → Hold to the logo → Let go of PowerIn the menu, you can navigate with volume buttons (up/down), and the choice is confirmed by the power button. Find the "Wipe Data" option and select it. In the next menu, select "Wipe Cache." The system will request confirmation - agree. After the process, select "Reboot" to reboot.
| Action. | Control button | The result |
|---|---|---|
| Moving on the menu | Volume Up/down | Selection of the right item |
| Confirmation of choice | Power button | Launch of the team |
| Clearing the cache | Wipe Cache | Deletion of temporary files |
| Exit and reboot | Item Reboot | Starting the system |
Deleting cache via computer (ADB)
The most radical and technically challenging method is the use of USB debugging and ADB (Android Debug Bridge) tools, which allows you to clear the cache of even system partitions that are not accessible in normal mode, and is suitable for experienced users who understand the principles of the command line.
First, you need to activate the developer mode on your smartphone. Go to About Phone and quickly click on MIUI seven times. Then, in the advanced settings, turn on USB Debugging. Connect the phone to your computer with a cable and install ADB drivers on your PC.
Open the command line on your computer and enter a command to enter the device shell. After connecting, execute a command to clear the cache of the Dalvik machine, which is responsible for optimizing applications.
adb shell pm trim-caches 999999999This command forcibly trims the application cache to a specified size (in this case, almost to zero, because there is a huge limit), which can significantly speed up the device, but requires the presence of an installed SDK Platform Tools on the computer.
⚠️ Attention: Use of teams ADB Incorrect commands can lead to the deletion of system files or unstable operation of the OS. Use this method only if you are confident in your actions.
Prevention of memory overflow
To avoid going back to cleaning all the time, you need to introduce a few habits of using the Redmi Note 9. First of all, set up automatic cleaning in the Security app. In the scanner settings, you can set a schedule that will allow the phone to remove garbage on its own, for example, every night while charging.
It is also recommended to limit the size of the cache in the applications themselves. In the Telegram settings, you can set the automatic deletion of media files after 3 days or a week. In the Chrome browser, you should periodically clear the history and cookies that also take up space.
Remember to remove unused applications. Even if you don't use them, they can update and accumulate background data. Regular audit of installed software helps keep the system on track.