How to Clean Xiaomi Redmi 9: The Complete Guide

Redmi 9 series smartphones have been well-deserved hits thanks to their excellent value for money, but over time even the most productive devices start to work slower. The main reasons for slowing down the interface, delays in starting applications and fast battery discharge are often overcrowded internal memory and accumulated system debris. Users often wonder how to effectively clean the phone to return it to its former sharpness and response speed.

In this article, we will take a look at all the available cleaning methods Xiaomi Redmi 9, from built-in tools MIUI to manually delete hidden files. Proper maintenance of the system does not require special technical skills, but knowing the nuances of the MIUI shell will help to avoid accidental deletion of important data and ensure stable operation of the gadget for many months.

Before embarking on radical measures like a full reset, it's worth trying less aggressive optimization methods: Clearing cache, removing duplicate photos, and disabling unnecessary system services can do wonders with the performance of budget processors. Let's look at each step of your smartphone's maintenance in detail and sequentially.

Use of the built-in "Security" application

The first and simplest tool that is already installed in your smartphone is the System Security app. Xiaomi developers have built a powerful cleaning engine that automatically scans the file system for temporary files, remnants of deleted applications and advertising debris. Launch a shortcut with a shield on your desktop and click the Clean Up button to allow the system to update the current memory state.

Once you have finished scanning, you will see a list of file categories that can be safely deleted. Please note that the standard scanner sometimes suggests removing the cache of long-out-of-use applications or old system logs. It is important to understand that deleting the cache of applications (such as a browser or social networks) will not affect your personal accounts and passwords, but will require re-uploading some data the next time you log in.

For a deeper setup, go to the app menu and select Clean up, where you can set up automatic garbage cleanup when the amount of free memory falls below a certain threshold, especially for models with 32 or 64 GB of internal storage, where the space ends faster.

In the same section, the Acceleration tool is available, which forcibly closes the background processes that devour RAM. Regular use of this feature helps free up the resources of the Helio G80 processor for an ongoing task, whether it is a game or navigation.

• 🧹 Regularly running a garbage scanner once in a while 2-3 Prevents the accumulation of gigabytes of temporary files.
• 🚀 The “Acceleration” feature is useful before running demanding games to free RAM.
• 🛡️ Antivirus module checks installed APK-file-based.

⚠️ Note: Do not use the Deep Clean feature without previewing unless you are sure about the contents of folders, as you can accidentally delete important documents or downloads.

System tools are good for daily maintenance, but they don't always see all the hidden files. Comprehensive cleaning will require a manual approach to memory management.

⚠️ Warning: When cleaning through third-party apps, be careful with permissions – they may request access to your contacts and geolocation without a real need.

Manual Memory Cleaning and File Management

The standard File Manager in the MIUI shell allows you to manually analyze the contents of internal memory. Go to the Storage Analysis section to see which folders occupy the most space. Often it turns out that a significant portion of the volume is occupied by messenger caches such as Telegram or WhatsApp, which store all the photos and videos you see.

Special attention should be paid to the DCIM/Camera folder, where your photos and videos are stored. If you shoot in high resolution, videos can take up tens of gigabytes. It is recommended to periodically transfer archival materials to your computer or to the cloud, making room for the system to work.

It’s also worth checking the Download folder. Browsers often save installation files there. APK, PDF-Documents and pictures that users forget about a week later, and deleting those files is safe and immediately frees up space.

For advanced users, it is possible to clean the Android/data folder, where the cached data of games and applications is stored. However, you need to be extremely careful here: deleting files in this directory can reset the progress in games or setting up programs.

Remember to check the Recycle Bin in the Gallery and Files app. Deleted files are stored there for another 30 days, continuing to take up space on the drive. Completely emptying the Recycle Bin is an easy way to instantly get a few gigabytes of free space.

Cleaning the cache and application data

Social media and instant messengers are prone to proliferation. Over time, the cache of a YouTube or TikTok app can grow to several gigabytes. To clean them, go to Settings → Apps → All apps, select the desired app and click Memory. There are two buttons available: Clear cache and Clear everything.

The first button is secure and only deletes temporary files, speeding up the application. The second button ("Clean Everything") completely resets the application to the "just out of the store" state, removing logins, settings and local data. Use this method if the application is not working correctly or takes up an abnormally large amount of space.

Chrome, Opera or the built-in Mi Browser store your browsing history, cookies and cache, and cleaning up that data not only frees up space, but also increases privacy by removing traces of your surfing.

In some cases, it makes sense to remove the heavy app and reinstall it, ensuring that all the tails and residual files that may have been left over from previous updates are deleted.

• 📱 YouTube and Instagram cache are the first candidates for cleanup, they are growing fastest.
• 🔒 Cleaning up your browser data removes saved passwords if they are not synced with your Google account.
• 🔄 Reinstall messengers – a radical but effective way to reduce their size at times.

Removal of system debris and duplicates

When installing and uninstalling applications, and when updating the system, there may be orphan files on Redmi 9’s drive, which are folders with remote program names or update logs, and can be found by searching for keywords in the file manager or using specialized utilities, although there is no built-in deep scanner for this in MIUI.

A separate category of garbage is duplicate files. Often users accidentally download the same file several times or save photos from chats that are already in the gallery. You can use the "Dublicates" function in the Files application or third-party light utility to search for copies.

It's also worth checking the folder. MIUI/debug_log. In some firmware versions, the system can maintain detailed debugging logs that take up space. If you're not a developer and you're not debugging the system, you can delete the contents of that folder.

Remember the Bluetooth folder at the root of internal memory. If you've ever transferred or received files over Bluetooth, they could stay there forever, taking up precious megabytes.

Regularly checking these directories helps keep the system clean without the need for third-party software, which often becomes a source of advertising.

Optimizing MIUI and disabling advertising

MIUI is known for its advertising integrations that not only annoy but consume CPU traffic and resources. To clean your phone of advertising junk, you need to turn off the MSA (MIUI System Ads) service. Go to Settings → Passwords and Security → Access to personal data, find “msa” and turn off the slider. Confirm the action by waiting 10 seconds.

Also, disable personalization of ads in the Privacy section, which will reduce the number of targeted ads in system applications such as Explorer, Music and Themes. Less advertising, less background processes and faster interface.

Another important aspect is the auto-run of applications. Many programs tend to start immediately after the phone is turned on, consuming RAM. Go to the Security app → Permissions → Auto-Run and leave only the messengers that you use all the time.

Turning off unnecessary visuals will also add speed, and in the Advanced Settings section, you can reduce the number of animations or turn them off altogether, making navigation on the menu more twitchy, but noticeably faster.

• 🚫 Shutdown MSA Remove system advertising in folders and standard applications.
• 🔋 Restricting auto-start significantly saves battery power in standby mode.
• ⚡ Reducing animations visually speeds up the work of old iron.

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Tip: After disabling the MSA service, restart your phone so that the changes take effect and the background ad processes are guaranteed to stop.

Resetting to factory settings as an extreme measure

If the software cleaning didn’t help and the phone continues to run slowly, the radical method remains – a full reset – which will return the Xiaomi Redmi 9 to the “out of the box” state, removing absolutely all user data, apps and settings.

Before starting the procedure, it is critical to back up all important data: use the built-in Mi Cloud or Google services to save contacts, photos and documents, and remember to link your Mi and Google account so that activation lock does not work after the reset.

You can reset via the settings menu: Settings → About Phone → Settings Reset → Erase all data. The phone will request an unlock password and confirmation. The process will take 5 to 15 minutes, after which the device will turn on as new.

⚠️ Warning: Make sure the battery is at least 50-60% Interrupting the process by turning off the phone may damage the system partition and cause the inability to turn on.

After reset, don't rush to install hundreds of applications at once. Watch the clean system work. Often it turns out that the brakes were caused by one particular application that you might not even be actively using.

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A complete reset is the (most effective) way to deal with software errors and accumulated system debris that cannot be manually removed.