Smartphones series Redmi 9 C from Xiaomi remain popular due to their affordable price and functionality, but over time, owners often face a lack of free space. The accumulation of temporary files, remnants of deleted applications and system garbage inevitably leads to a slower interface and reduced device performance. Understanding how to properly manage this data is a key skill for any Android user.
In this article, we will examine in detail all the available cleaning methods, ranging from standard system tools to more advanced techniques. Clearing the cache is a safe procedure that does not delete your personal photos, contacts or instant messenger conversations, but can significantly free up space. It is important to distinguish between types of memory and know which files can be deleted without risking the stability of the operating system.
We will consider not only automatic tools built into the MIUI shell, but also manual methods for managing specific applications. Sometimes automatic algorithms cannot cope with deep garbage, and then your direct intervention is required. The correct approach to maintenance Redmi 9 C will extend its active service life and maintain performance even after long months of use.
Why do you need to regularly clear the cache on Android
The cache is a temporary data storage that applications use to quickly load frequently used information. For example, when you open a news site or social network, images and interface elements are saved in memory so that when you visit again, the page loads instantly. However, over time, the size of these temporary files can grow to gigabytes, taking up valuable space in the device's internal memory.
On devices with limited internal storage, such as Redmi 9 C, cache overflow often causes lags and sudden app closures. The Android system may start to slow down because it does not have enough resources to write new temporary data. Regular maintenance helps to maintain optimal performance and avoid errors in applications.
⚠️ Attention: Clearing the cache does not delete your logins, passwords or game progress, but may require you to re-authorize some applications the next time you launch them.
There is a misconception that clearing the cache always speeds up the phone. In fact, immediately after cleaning, some applications may load a little slower, since they will have to regenerate temporary files. However, in the long run, freeing up space is critical to system stability. This is especially true for models with a memory capacity of 32 or 64 GB, where every megabyte counts.
Using the built-in Security application
The MIUI shell installed on Redmi 9 Coffers users a powerful built-in tool for system maintenance. The Security application combines the functions of an antivirus, memory optimizer and garbage cleaner. This is the easiest and safest way for most users to quickly free up space without the risk of deleting something unnecessary.
To start the procedure, you need to find an icon on the desktop called “Security” or “Security” and run it. In the main menu you will see a “Cleaner” button indicating the volume of files that can be deleted. Clicking on this button will start a system scan, during which temporary files, ad junk and remnants of deleted apps will be found.
☑️ Check before cleaning
After scanning is completed, the system will offer to delete the found files. It is important to look at the list carefully, as sometimes there may be large files that you downloaded recently. Although Xiaomi's standard algorithm is quite accurate, manual control never hurts. Click the clean button to complete the process.
Run the built-in cleaner once a week to prevent large amounts of junk files from accumulating.
Manually clear the cache of individual applications
Sometimes the built-in cleaner cannot remove the deep cache of heavy applications such as Telegram, YouTube or TikTok. In such cases, manual intervention is required through the system settings. This method allows you to specifically free up space occupied by a specific gluttonous applicationwithout affecting the data of other apps.
To get to the desired menu, go to Settings and select the item Applications. Next, click on All applications and find the desired app in the list (for example, Instagram). Inside the application menu, select Memory or Storage, where you will see two buttons: “Clear” and “Clear all.”
The Clear Cache button deletes only temporary files, leaving your accounts and settings intact. The “Clear Data” button resets the application to its state immediately after installation, deleting logins and saved data. Be careful when choosing an action so as not to lose important information.
| Application | Data type | Safely delete | Risk of data loss |
|---|---|---|---|
| YouTube | Video cache | Yes | No |
| Telegram | Media cache | Yes | No (if there is a cloud) |
| Chrome | Site cache | Yes | No (logins will be saved) |
| Games | Resource cache | No | High (progress) |
Particular attention should be paid to instant messengers. In Telegram, for example, the cache can occupy tens of gigabytes if there is no limit in the settings. It is better to use the built-in cache clearing function inside the application itself by going to Settings → Data and memory → Memory usage. This is a more flexible tool than the system one.
What to do if the clear button is inactive?
If the “Clear” button is gray or not clickable, this means that the application is running in the background or has administrator rights. Try to force stop the application before cleaning.
Cleaning through developer mode and Recovery
For more experienced users, it is possible to clear the system cache through a special Recovery menu. This method is useful if the phone is unstable after an update or the installation of applications was completed with errors. This partition is accessed before the main operating system is loaded.
To enter Recovery mode on Redmi 9 C, you must completely turn off the device. Then hold down 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 continue to hold the volume until the menu appears.
In the Recovery menu, navigation is carried out using the volume buttons (up and down), and the selection is confirmed with the power button. You need to find the item Wipe Cache Partition. Do not confuse it with Wipe Data, which will completely delete all your personal files and return the phone to factory settings.
⚠️ Attention: In new versions of Android (11 and higher), access to the Wipe Cache Partition in Recovery may be hidden or removed by the manufacturer. If you do not see this option, use other cleaning methods.
This method clears the Dalvik/ART system cache, which is used to launch applications. It does not affect user files, but may require more time to first boot the system after a reboot. Use this method only if you are confident in your actions.
Recovery mode is a powerful tool, but requires caution. An error in selecting a menu item can lead to complete loss of data.
Automation and third-party utilities
If manual cleaning seems too labor-intensive for you, you can consider installing specialized applications from the Google Play Store. However, you should be extremely selective: many “cleaners” themselves consume a lot of resources and show intrusive advertising. It is better to choose proven solutions from well-known vendors.
One of the reliable options is Files by Google. This is an official application from Google that can safely find duplicates, old screenshots and temporary files. It doesn't require deep permissions and works in the background, offering to remove garbage only when the space actually runs out.
It is also worth mentioning the “Memory Expansion” function, which is sometimes found in the settings. It uses part of the internal memory as virtual RAM. While this may help with multitasking, heavy use of this feature will increase wear and tear on your drive. For Redmi 9 C with its amount of memory, it is better to monitor free space using classical methods.
- 📱 Use only proven applications for cleaning, avoiding dubious “accelerators”.
- 📱 Set up automatic cleaning in instant messengers (for example, in Telegram: “Auto-delete” media").
- 📱 Regularly check the “Downloads” folder, where forgotten APK installation files often accumulate.
Automation of processes is good, but you should not rely on it completely. Periodic manual inspection of the file system can help uncover forgotten large videos or documents that have been taking up space for years. A combination of automatic tools and manual control gives the best results.
Preventing memory overflow
The best cleaning is the one that is not required. In order not to wonder how to clear the cache on Redmi 9 C every two weeks, you should change your smartphone usage habits. First of all, this concerns storing media files and installing applications.
Try not to store huge libraries of music and videos directly in the phone’s memory. Use cloud storage or streaming services. It is better to transfer photos and videos immediately after shooting to a computer or to the cloud, deleting them from the device. This will free up gigabytes of space for system operation.
Another important aspect is control over notifications and background activity. Many apps constantly download content even when you're not using them. Disabling background data transfer for rarely used apps will help reduce the amount of cache created.
Why does the memory fill up on its own?
Often the memory is filled with social networking applications that cache viewed feeds and videos. Check your "Auto-download media" settings in WhatsApp and Viber.
Maintaining digital hygiene extends the life of your Redmi 9 C. Regularly remove unused applications, even if they are just hanging on your desktop. Each installed application, even if you do not use it, can create temporary files and background processes.
Is it possible to delete files from the Android/data folder?
The folder Android/data application data is stored in the folder. It is possible to delete the contents of this folder manually through the file manager, but this may lead to resetting application settings or losing progress in games. It is safer to do this through the settings of a specific application.
Does clearing the cache affect the battery?
Clearing the cache does not have a direct effect on battery capacity. However, if the phone does not slow down due to lack of memory, the processor operates in a more optimal mode, which can indirectly have a positive effect on autonomy.
Do you need to reboot the phone after cleaning?
Rebooting is not strictly necessary, but is advisable. It allows the system to re-index files and start processes from scratch, consolidating the effect of the optimization.
Why does the space quickly run out again after cleaning?
If the space runs out immediately after cleaning, most likely one of the applications (often a messenger or browser) has settings to save all media files. Check your startup settings in WhatsApp, Telegram and your browser.
Is it safe to use apps like Clean Master?
Modern versions of Android (including MIUI) have built-in efficient memory management mechanisms. Third-party “process killers” often work worse than their system counterparts and can even slow down the phone by constantly restarting services.