Modern smartphones like the Xiaomi Mi 9 have powerful stuffing, but they start to run slower over time. The main reason for the performance decline is often overcrowded system memory and accumulated cache files. This temporary data is created by applications to speed up content loading, but over time turns into digital garbage, which slows down the Android operating system.
Regular cleaning of this data allows you to return the device to its former sharpness and free up gigabytes of free space. owners of flagships of previous years are especially often faced with memory shortages, so the question of how to clean the cache on Xiaomi 9 remains extremely urgent. Proper memory maintenance prolongs the life of the drive and prevents errors in the operation of programs.
In this guide, we will look at all the cleaning methods available, from standard MIUI tools to advanced methods through the engineering menu, which files can be deleted without risk to the system, and which are better not to touch.
What is cache and why remove it on Android
Cache is a buffer memory that stores temporary files that are necessary for fast application operation. When you launch Instagram or browser, the system loads pictures and scripts into this buffer so that when you reopen the page load instantly, but the size of this data tends to grow constantly, taking up valuable space in the internal storage.
The problem is when the cache gets too big or corrupted, instead of speeding up, it causes conflicts that cause programs to crash and freeze the interface, and cleaning up the cache is not about deleting your personal photos or contacts, but just resetting temporary files that can be recreated.
On Xiaomi devices with MIUI shell, the process of garbage accumulation can occur faster due to aggressive work of background services. The system tends to keep applications in memory, which leads to the proliferation of temporary files. Regular resetting of this data is an important part of the prevention of software failures.
- 🚀 Accelerate the launch of heavy apps and games by freeing up resources.
- 🛠️ Removing errors in programs that have ceased to function correctly.
- 💾 Free up space for installing new updates or applications.
- 🔋 Reducing the load on the processor, which has a positive effect on autonomy.
⚠️ Caution: Clearing the cache does not delete your logins, passwords, and game progress.However, some messengers may require re-authorization, so make sure to remember the login details.
Use of the built-in Security application
The easiest and safest way to clear the cache on the Xiaomi Mi 9 is to use a standard system application built into the default MIUI shell and optimized to work with the file system of this model, which is ideal for users who do not want to risk deleting important system files.
Run the Safety app on the home screen. It usually has a green icon with a shield. Once opened, click on the large Clean or Speed button. The system will automatically analyze the device and find files that can be safely deleted, including app cache, advertising debris and remnants of remote programs.
Once scanned, you'll see a list of categories of garbage. Click Clean to delete everything you find. Deep Clean is often available on this menu, which allows you to choose in more detail what to delete, such as large files or duplicate photos.
☑️ Checking before cleaning
It's important to note that the built-in cleaner sometimes flags files that might be useful to you as garbage, such as offline card cache or saved messaging messages in instant messengers. So, before you delete them, always check the list of files in the Deep Clean section. This will take an extra minute, but it will save you from losing important data.
Manually cleaning the cache of individual applications
If a particular application is not working properly or takes up suspiciously much space, it makes sense to clean its cache individually, this method is more point-based and allows you to free up space without affecting the data of other programs. Often it is the cache of YouTube, Telegram or Chrome that grows to gigabytes.
To do this, go to your smartphone Settings. Select the Apps in the list, then click All Apps. Find a program you want, like Google Chrome, and open its properties. You're interested in Memory or Storage.
In the menu that opens, you'll see two buttons: Clear cache and Clear everything (or Erase data). Press the first button. The second button will completely reset the application to the state after installation, removing your logins and settings, which in this case is not required.
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Cache messengers like WhatsApp and Telegram are better cleaned through their own settings in the section "Data and storage", as system cleaning may not delete downloaded media files completely.
Repeat this procedure for the most heavy applications regularly, which will help keep the amount of memory they take up under control, especially for social networks that store a lot of temporary images and videos.
Cleaning through the Recovery Mode menu
For deeper cleaning, which affects the system cache (Dalvik Cache), you can use Recovery mode. This method is useful if the phone is unstable, often restarts or after a system update.
To enter recovery mode on the Xiaomi Mi 9, turn the device off completely. Then press the volume button and the power button at the same time. Hold them until the Mi logo appears, then release the power button, while keeping the volume high. You will be taken to the Recovery menu, where the control is carried out by the volume buttons and the choice by the power button.
In the menu, select Wipe Data and then Wipe Cache. Don't confuse this with Wipe All Data, which will completely delete all your files. Once confirmed, the phone will clear the system cache and prompt you to restart.
| Cleaning method | Security of data | Efficiency | Difficulty |
|---|---|---|---|
| Security Annex | Tall. | Medium | Low. |
| Application settings | Tall. | High (point) | Low. |
| Recovery Mode | High (with care) | Very high. | Medium |
| Third-party utilities | Medium | Medium | Low. |
⚠️ Attention: In Recovery mode, navigation is done with volume (up/down) and power (select).Do not press the Wipe All Data button unless you plan to completely reset your phone to factory settings.
What's Dalvik Cache?
Third-party applications for memory cleaning
If there are not enough built-in tools, you can use proven third-party utilities from Google Play. However, you should approach the choice of such programs carefully, since many of them consume a lot of resources and show intrusive advertising.
Popular applications like Files by Google, CCleaner, or SD Maid can find hidden remnants of deleted programs and empty folders. They provide a more detailed report of what exactly occupies space, and installing such an assistant can be useful for periodic deep analysis of the file system.
When using third-party software, be sure to check which files the program suggests to delete. Often they classify the messenger cache as junk, although it may store important work documents, manual control in such cases is necessary to avoid accidental loss of information.
- 📱 Files by Google – official application with minimalist interface and safe cleaning.
- 🧹 SD Maid is a powerful tool for advanced users, able to find the “body” of remote applications.
- 🚀 CCleaner - a classic utility with real-time system monitoring function.
Preventing and optimizing the Xiaomi Mi 9
To avoid the need for frequent manual cleaning, it is worth introducing several smartphone usage habits. Xiaomi Mi 9 has fast UFS memory, but it also has a limit on the number of rewriting cycles. Excessive cache generation and deletion can theoretically reduce the life of the drive, so the golden mean is important.
Try not to store hundreds of unnecessary photos in the gallery and regularly delete videos from WhatsApp that are automatically stored in memory.It is also useful to disable the autoload of heavy applications that you rarely use, this will reduce background activity and slow down the accumulation of temporary files.
Once a month, it's recommended to audit installed programs. Remove those that haven't been used in the last six months. Every application, even if it's rarely launched, caches and takes up space. Keeping order on the list of programs is the best brake prevention.
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Regularly cleaning the cache is not a one-time promotion, but part of a smartphone usage culture that helps the device run fast over the years.
Compliance with these simple rules will allow your Xiaomi to stay fast and responsive. Remember that crowded memory is the main enemy of the performance of any operating system.