Xiaomi’s Redmi Note 8 series of smartphones have proven to be reliable, with excellent value for money. However, over time, even the most powerful processor can run into a shortage of RAM, and embedded storage is overflowing with unnecessary temporary files, an inevitable process of accumulating digital “junk” that slows down interface response and application performance.
Cache cleaning is the safest and most efficient way to get your gadget back on track without losing personal photos or contacts. Unlike a full factory reset, this procedure only affects the temporary data that a system or application has created to speed up its work, and over time, these files can get damaged or take up gigabytes of usable space.
In this guide, we will take a look at all the cleaning techniques available, from standard MIUI shell tools to advanced engineering menu actions, and learn to distinguish system cache from these applications, and understand when intervention is really needed.
Why cache accumulates and when it is necessary to clean
Data caching is a fundamental principle of the Android operating system: when you open an application or a web page, the system stores its elements (images, scripts, thumbnails) in temporary storage. When you start it again, the device reads information faster than if it downloads it again from the Internet or from the main drive. However, cache files do not have the property of self-cleaning to the desired extent.
Over time, this amount of time data can reach several gigabytes, especially social networks, messengers and browsers, if you notice that Redmi Note 8 has started to load games longer, slows down when scrolling tapes or apps suddenly close, this is a sure sign of overcrowded cache, and it is also worth cleaning after updating the firmware, when old system files may conflict with new ones.
⚠️ Warning: Don’t confuse cache cleaning with app data deletion.If you select the “Clean Data” option, the program will return to state immediately after installation, and you will lose logins, settings, and game progression.
There are two main types of cache that you have to work with: system cache (system cache) and user cache (individual application cache). System cache stores temporary files of the MIUI operating system itself, whereas user cache refers to specific programs. For maximum efficiency, it is recommended to clean both types, but you need to do this in different ways.
Use of the built-in "Security" application
The easiest and most affordable way for any user to clean up is to use a standard tool from Xiaomi. MIUI shell comes with a pre-installed Security application, which combines antivirus and memory optimizer, which is ideal for regular maintenance of the device without the risk of damaging system files.
To get started, look for a green shield icon on your desktop or go to the Tools folder. Launch the app and wait for the automatic scan. The system will analyze memory status, viruses and junk files. Click the large green Cleanup button to delete temporary files, uninstall residues and ad cache.
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For a deeper cleaning in the Safety app, click on the broom icon and then select the "Dumpster Cleanup" item in the bottom menu - this will trigger a more thorough scan.
Once the process is complete, the system will show how many megabytes have been released, and it's important to understand that this method cleans mostly surface debris, and it doesn't touch the cache of heavy applications like YouTube or Telegram, because that data is considered important for the quick operation of programs, so it will take additional steps to fully optimize.
- 🚀 Open the Security app on the home screen.
- 🧹 Click on the Cleanup button to delete temporary files.
- 📂 Go to the Application Management section for manual cleaning.
- ⚙️ Use the “Acceleration” function to free up RAM.
Manually cleaning the cache of individual applications
If a particular program is unstable or takes up too much space, the cache needs to be cleaned manually, especially for multimedia applications that store thousands of thumbnails and video files. In Redmi Note 8, this process is standardized and takes only a few seconds.
Go to the Settings menu and select the App, then click All Apps. In the list that opens, find the program you want (like Instagram or Chrome). Inside the app menu, you'll see the Memory button or the amount of occupied storage you'll see.
☑️ Manual cleaning algorithm
It's important not to mix up the buttons. The Clear Cache button is secure and only deletes temporary files. The Clear button (or Wipe Data) resets the app completely. If you want to just free up space, just click on the cache cleaner. After that, the app size in the list will decrease, and the program will remain with all your settings.
| Type of data | What's removed | Security | Impact on the account |
|---|---|---|---|
| Cash. | Temporary files, thumbnails | Completely safe. | No (remain in the system) |
| Data data | Logins, passwords, settings | It requires caution. | Yeah (exit account) |
| Files. | Uploaded documents | Safe for the system. | Depends on the app. |
Cleaning through Recovery mode (System cache)
For deeper cleaning, which affects system temporary update and installation files, you need to use Recovery Mode. This method is especially useful if the Redmi Note 8 phone behaves strangely after a firmware update or if standard methods do not work.
To enter this mode, you need to turn off your smartphone 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, but keep the volume down until the Recovery menu appears. The navigation is done with the volume buttons and the power button selects.
What to do if the menu does not appear?
In the Recovery menu, look for Wipe Data. Attention: in newer versions of MIUI, this item may be called "Wipe All Data" or simply "Clear Data." You need to select the Wipe Cache option, not "Wipe All Data." If you choose to completely erase, the phone will reset to factory settings with all files lost. Be extremely careful when choosing.
⚠️ Attention: Some versions of Recovery have Chinese menus, orientate by icon or color: usually, cleaning the cache is the top option, and a full reset is the bottom, often red. If in doubt, it's best not to take risks.
Use of debugging mode and ADB
For advanced users who want to gain full control of Xiaomi’s file system, there is a computer-cleaning method and an ADB (Android Debug Bridge) utility that allows you to remove the cache of system applications that are not available through the standard settings menu, which requires you to connect to your PC and install drivers.
First, you need to activate the developer mode. Go to Settings. → About the phone and seven times quickly click on the build number MIUI. You'll see a notification that says, "You've become a developer." Then you'll turn on the "Additional" menu. USB-Connect the phone to the computer with a cable.
adb shell pm clear com.android.browserThis command, for example, will completely clear the cache and data of a standard browser. To clean the cache of the entire system through ADB, root rights are often required, which is not recommended for ordinary users, as it violates the warranty and can lead to security errors. However, cleaning the cache of specific packets works without root.
- 💻 Install the platform SDK Platform-Tools on the computer.
- 🔌 Turn it on. USB-debugging in the developer settings.
- 📱 Confirm the connection request on the smartphone screen.
- ⌨️ Enter commands in the terminal to manage packages.
Automation and prevention of contamination
To avoid manual cleaning every week, you can set up process automation. MIUI has Autostart and permission management to help control application behavior. There are third-party but proven utilities that can run in the background without harming the battery.
It is recommended to check the Download folder and the messenger cache (WhatsApp, Telegram) regularly, as they often save heavy video files that are not deleted automatically.
It’s also worth turning off automatic app updates over the mobile network to avoid clogging up temporary installation files at the wrong time.Google Play’s setup allows apps to only be updated via Wi-Fi, which also saves traffic and reduces storage load.
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Regular prevention (once every 2-3 weeks) takes less time than dealing with the effects of overflowing memory when the phone starts running in slideshow mode.