How to Clean Xiaomi Redmi Note 4: Speeding Up and Cleaning Up Memory

Xiaomi’s Redmi Note line of smartphones is well-deservedly considered a favorite due to their excellent price-performance ratio, but over time, even powerful devices start to work slower. Users often notice that the MIUI interface begins to slow down, applications open longer than usual, and free space in memory disappears rapidly. This is a natural process of accumulation of digital garbage, cache and temporary files, which requires regular intervention to maintain high performance of the gadget.

It is especially important for owners of the Redmi Note 4 model to monitor the state of internal memory, since this smartphone, released several years ago, has limitations on the amount of available storage in basic versions. Proper and timely cleaning of the system allows you not only to free up gigabytes of space, but also to extend the battery life, reducing the load on the processor. In this article, we will discuss how to safely and efficiently clean your device using both built-in tools and advanced methods.

Before you start radical measures, you need to understand the structure of memory filling and sources of garbage. System logs, remnants of remote applications and browser cache can take up to 30% of the useful volume, creating the illusion of lack of space for new photos or programs. Competent approach to service Xiaomi will help avoid buying a new phone, significantly prolonging the life of your current gadget.

Memory Occupancy Analysis and Hidden Files Search

The first step in the optimization procedure is to diagnose in detail what exactly is taking up space on your Redmi Note 4. The standard settings menu provides basic information, but for in-depth analysis it is better to use specialized tools of the MIUI shell. Go to Settings → Memory to see the visualization of the data distribution between applications, photos and system files.

Often users are unaware that a significant portion of the volume is occupied by messenger folders such as WhatsApp or Telegram, which automatically store all received media files. This data can be duplicated in the gallery and in the file system, occupying space twice. Using the built-in analyzer allows you to quickly identify such “heavy” directories and decide whether to delete or transfer them to the memory card.

• 📂 Check the folder. DCIM Duplicate photos and videos that often remain after failed attempts to shoot or screencasts.
• 📱 Analyze the list of installed apps and remove those you haven’t used in the past three months.
• 💾 Note the “Other” section, where temporary update files and remnants of deleted programs are often hidden.

⚠️ Note: When analyzing memory, do not manually delete files with the.obb or.data extension unless you are sure of their identity, as this can lead to incorrect operation of games and applications.

Use of the built-in "Security" application

Xiaomi has equipped its smartphones with a powerful built-in optimization tool called “Security.” This system component is able to automatically scan the device for malware, advertising debris and unnecessary cache. Run deep cleaning through this application is the safest way for the average user, since the MIUI Security algorithms know which files can be deleted without risking system stability.

To get started, open the app with the shield icon and select Clean. The system will quickly analyze and suggest that temporary files that do not affect the operation of the programs be deleted. It is recommended to do this regularly, for example, once a week, to prevent the accumulation of large amounts of debris. Once you complete the scan, you will see the Clean button, clicking on which will free up space instantly.

However, standard cleaning doesn’t always affect the deep cache of social networks and messengers. The Security app has a separate Deep Clean section that allows you to view the contents of memory in more detail, and you can safely remove old APK installation packages, large files and duplicates that were missed during a quick scan.

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Set up automatic garbage cleanup in the Security app so that your phone clears temporary files every time the screen locks or the device connects to charging.

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The built-in Security app is the most reliable tool for basic cleaning, which minimizes the risk of deleting important system files by mistake.

Manual cleaning of cache and application data

The most effective, but careful method is to manually clean up specific applications. Social media, browsers, and streaming services tend to accumulate a huge amount of temporary information, which can eventually reach several gigabytes. To access this data, go to Settings → Applications → All applications and select the desired program from the list.

In the menu of the selected application, you will find two important buttons: Clear cache and Clear data. The first option deletes temporary files, such as thumbnails of images and temporary scripts, which is safe and does not require re-authorization. The second option, clearing data, returns the application to state immediately after installation, removing logins, passwords and settings, so use it with caution.

Special attention should be paid to browsers such as Chrome or the built-in MIUI Browser, which can be found in the "History" or "Personal Data" section, where thousands of records about visited sites are stored. Regular cleaning of history and cookies not only frees up space, but also increases privacy, and can solve problems with the improper display of some web pages.

It’s important to understand the difference between cache and data: Cache speeds up the loading of frequently visited pages and apps, but clearing it won’t result in the loss of personal information, unlike the “Erase Data” button, which completely resets the application.

Removal of system debris and residual files

Even after deleting applications, the system often has tails — folders with configuration files, error logs, and libraries that are no longer needed — that can accumulate over the years, taking up valuable space on the Redmi Note 4.

At the root of internal memory, you should look at folders with the names of programs that have been deleted long ago. If you are sure that the program is deleted, the corresponding directory can be safely deleted, and a lot of garbage accumulates in the Download folder, where often forgotten installers and documents get into.

⚠️ Warning: Never delete folders with the names of Google or Xiaomi system services (e.g. com.android.providers or com.miui.securitycenter), this can lead to a cyclical phone reboot.

Cleaning through Developer Mode and ADB

For advanced users who want to get the most out of it, there is a USB debugging and computer cleaning method that allows you to delete the system cache and temporary files that are not available through the normal interface. First, you need to activate the developer mode by going to Settings → About Phone and quickly clicking on the MIUI build number seven times.

After activating the developer mode, activate the item "Debugging by USB" And connect the phone to the computer using the platform. ADB (Android Debug Bridge, you can send a command to clear the Dalvik cache, which often helps to eliminate deep system lags:

adb shell pm trim-caches 999999999

This command forcibly cuts the cache of all applications to the lowest possible value, freeing up a significant amount of memory, but it is worth using it only if you understand the way ADB works, since improper interaction with system processes can cause instability.

Radical measures: Resetting to factory settings

If none of the above methods have worked and the phone continues to run slowly, the last and most effective option is a full reset to factory settings (Hard Reset), which completely removes all user data, applications and settings, returning the Redmi Note 4 to the “out of the box” state.

Before you start, it's critical to back up all your important data. Use Google Drive, or the built-in MIUI backup to save your contacts, messages, and settings. Once reset, you can restore that data, but you'll have to download the apps you've installed again.

To perform the reset, go to Settings → Advanced Settings → Recover and Reset. Select Settings Reset and confirm the action. The phone will restart and start the cleanup process, which can take 5 to 15 minutes. Once turned on, you will get a clean, fast system without unnecessary software debris.

⚠️ Warning: Make sure the battery is at least 50% full before starting the reset, as a sudden power outage during the process could damage the phone's software.

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Hard Reset is the only guaranteed way to remove 100% of the garbage and viruses, returning the phone to its original speed.

Prevention and operation rules of MIUI

In order not to face the problem of overcrowded memory and slow work in the future, you should adhere to simple rules of operation of the smartphone. First of all, do not fill the internal memory to the end; always leave at least 10-15% of the total volume free for normal operation of the system and paging files.

Check your automatic save settings in instant messengers regularly. Turn off the Save to the Gallery feature for WhatsApp and Telegram so that media files don’t duplicate or take up space unnecessarily. It’s also helpful to audit installed games and apps once a month, removing unnecessary ones.

• 🔄 Use the Cleanup function in the Security app weekly.
• 📸 Set up sync photos with the cloud and delete originals from the device.
• 🚫 Avoid installing accelerators and antiviruses from unknown sources, which are often the source of advertising.

Compliance with these simple guidelines will allow your Xiaomi Redmi Note 4 to stay fast and responsive for a long time, even taking into account the age of the device.