Cache Clearing on Xiaomi Redmi 9: A Complete Guide with Pictures and Tips

Why Redmi 9 cache needs to be cleaned regularly – and when it’s dangerous

Cache memory on Xiaomi Redmi 9 is like a temporary warehouse for these applications: photos in messengers, video thumbnails, cached browser pages and even game fragments. On the one hand, it speeds up the phone: you do not need to download the same elements every time. On the other hand, over time, the cache grows to giant sizes (on Redmi 9 with 64 GB of memory, users often encounter 5-10 GB of “garbage”), slowing down the system and causing errors.

But there's a caveat: not all cache can be deleted without consequences. For example, cleaning the cache of system applications (like com.android.systemui) can cause MIUI to malfunction, and erasing Google Play Services data can cause update problems. In this article, we'll discuss how to safely clean the cache on Redmi 9 without breaking the phone, and what methods have the maximum effect.

Let me warn you right away: if your Redmi 9 is slowing down due to memory shortages, cleaning the cache is only a temporary solution. To dramatically accelerate it, you will need to reset to factory settings or change the firmware.

Method 1: Clear cache via MIUI settings (the safest)

This method is suitable for beginners and does not require superuser rights; it allows you to delete the cache of individual applications or all at once without affecting user data (photos, messages, accounts).

Instructions:

1. Open Settings → Applications → Application Management.
2. Click on the three dots in the upper right corner and select Sort by size, so you will see the most "gluttonous" programs.
3. Select an app (like Facebook or YouTube) and tap Storage.
4. Click Clear Cache. For a complete reset (along with the app settings), use Clear Data - but be careful: this will delete logins, saves, etc.

To clear the cache of all applications at once:

1. Go to Settings → Memory → Clean (or Settings → Additional → Clean up in new versions of MIUI).
2. Click Clean next to the Cash app item.
3. Confirm action. The system will show how much space has been vacated (usually 1-3 GB).

Close all active applications

Backup important data (e.g. game saves)

Connect your phone to charge (the process can take 5-10 minutes)

Check the memory space (less than 10% is a reason to reset)

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Important: After cleaning the cache, some apps (such as Instagram or TikTok) will take longer to load on the first run – this is normal, and you may also need to re-enter logins in banking programs (such as SberBank Online).

Method 2: Using Recovery Mode (for power users)

If the phone is slowing down and does not respond to commands in the MIUI interface, you can clean the cache through Recovery Mode, which works even if the system is getting stuck on the Redmi logo.

Step-by-step:

1. Turn off your phone. Press the Power + Volume buttons up at the same time and hold it for 10-15 seconds until the Mi logo appears.
2. In the Recovery menu, select a language (if there is one) and go to Wipe & Reset (or Data Cleanup).
3. Choose Wipe Cache (not to be confused with Wipe Data – it’s a complete reset!).
4. Confirm the action and wait until the completion (usually 1-2 minutes).
5. Restart your phone through Reboot → System.

⚠️ Note: if you accidentally chose Wipe Data over Wipe Cache, the phone will perform a full reset to factory settings, in which case it will be impossible to recover data without a backup!

After cleaning the cache through Recovery, the phone can boot longer when it first turns on, which is normal. If the freeze is repeated, the cause may be a damaged firmware (the solution is to flash it through the Mi Flash Tool).

Method 3: Automatic cleaning with built-in MIUI tools

Xiaomi Redmi 9 has a built-in Security utility that can analyze and clean the cache automatically, which is less processor-loading than manual cleaning, and is suitable for regular maintenance.

How to use:

1. Open the Security app (the shield icon).
2. Go to the Cleanup tab (or Boost in newer versions).
3. Press Deep Clean and wait for analysis (may take 1-3 minutes).
4. Select the Cash category and click Clear.
5. For maximum effect, enable the option Autoclean in the utility settings.

Advantages of this method:

• 🔍 Analyzes not only cache, but also residual files, duplicate photos.
• 📊 Shows which apps take up the most space.
• 🤖 Can work in the background (e.g., clear cache at night).

Disadvantage: the built-in utility does not always delete the system cache (for example, update files). MIUI Or the Google Play Services cache. ADB (5).

Method 4: Third-party applications for cleaning the cache

If the built-in MIUI tools don't seem efficient enough, you can use third-party utilities.The best options for Redmi 9 are:

Important: Before using third-party cleaners:

• 🔒 Check the permissions of the application (some ask for access) SMS or contacts, it is suspicious).
• 📱 Backup important data (for example, via Mi Cloud or Google Drive).
• 🚫 Don’t use “accelerate” or “cool” features – they often just shut down background processes, which can disrupt your phone.

⚠️ Note: Applications like Clean Master or DU Speed Booster often tricks users into showing a "freed" place that isn't really there, such as deleting the browser cache but not touching system files. Always check the free space in the Memory settings after cleaning.

Method 5: Cleaning the cache through ADB (for advanced users)

If previous methods didn’t help and the phone is still slowing down, you can delete the cache via Android Debug Bridge (ADB). This will allow you to clear even system files that are not available through normal settings. USB-cable.

Instructions:

1. Download and install ADB Tools on PC.
2. On the phone, turn on Developer Mode (go to Settings → About Phone and tap the MIUI version 7 times).
3. Return to Settings → Additional → For developers and enable USB debugging.
4. Get Redmi on board. 9 PC and command line (Windows) or terminal (Mac/Linux) enter:

adb devices

(The name of your device should appear).

adb shell pm trim-caches 1000G

(This is a command to clear the cache of all applications.)

To clear the cache of a particular application (e.g. Google Play Market):

adb shell pm clear com.android.vending

Important: pm clear not only removes the cache, but also all application data (settings, logins, etc.) and only use it if you are ready to reconfigure the program.

1. Use the original USB cable (not all cables support data transmission).

2. Install Xiaomi USB Drivers drivers from the official website.

3. Switch the connection mode on the phone from "Charging" to "Transfer of files".-->

What if cleaning the cache doesn’t help?

If Redmi 9 still slows down after all the manipulations, the problem may be deeper:

• 🔋 Worn-out battery: at a health level below 70%, the phone begins to artificially limit performance. check battery status via the AccuBattery app.
• 🖥️ Outdated firmware: MIUI 12 and below on Redmi 9 is often glitzy.Update to the latest version via Settings → Updating the system.
• 🦠 Viruses or malware: Some apps (especially from third-party sources) can boot the processor.
• 🗑️ Memory fragmentation: If less than 10% of the total volume is free, the system starts to work unstable. SD-map.

Extreme measures:

1. Reset to factory settings: delete all data, but return the phone to its original state. Pre-backup through Settings → Additional → Backup.
2. Flashing: If MIUI is unstable, you can install custom firmware (e.g. Pixel Experience) or the official global version via the Mi Flash Tool.

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Redmi 9 has been slowed down after the update MIUI, Try to retrace the previous version via Fastboot. 4PDA model-themed.

FAQ: Frequent questions about cleaning up cache on Redmi 9