Over time, the operating system Android 9 accumulates a significant amount of temporary files that can slow down the device. Many users notice that their smartphone starts to slow down or displays errors about lack of space, even if the gallery and downloads are empty. This is due to the fact that system cache and the application cache grows, taking up precious gigabytes of built-in memory.
In this article we will analyze in detail the safe methods for freeing memory, available specifically in the version Pie. You will learn how to distinguish harmless temporary files from important system data, so as not to disrupt the stability of the gadget. Proper cleaning can restore the interface to its former responsiveness and extend the life of the drive.
The procedure does not require obtaining root access or installing questionable software. All the necessary tools are already built into the shell of your device. However, it is important to understand the difference between clearing a specific application and completely resetting the system partition, since the consequences of these actions are radically different.
What is the cache and why it needs to be cleared on Android 9
The cache is a memory area designed to store temporary data that is often used by the system or applications. These could be image thumbnails, web page elements, error logs, or intermediate calculation results. The main purpose of caching is to speed up the loading of content and reduce the load on the processor during repeated requests.
However, in the operating system Android 9 the memory management mechanism sometimes works incorrectly. Files that should have been deleted automatically remain on the disk. Over time, the volume of such “garbage” can reach several gigabytes. This leads to the internal memory filling up, and the system has nowhere to write new data.
In addition, damaged cache files often cause unstable apps. If an application crashes on startup or freezes at a certain stage, the culprit is often an incorrectly formed cache. Regular checking and cleaning helps keep your device in good shape.
It is worth noting that not all temporary files are harmful. Some of them are necessary for the interface to work quickly. Therefore, blindly deleting everything can lead to the opposite effect: the smartphone will start working slower until it creates new cache files. It is important to approach the process selectively.
⚠️ Attention: Completely clearing the system partition (Wipe Cache Partition) is safe for your personal data, but may temporarily slow down the phone when you first turn it on, since the system will have to re-index the files.
Clearing the cache of individual applications through settings
The easiest and safest way to free up space is to delete temporary files of specific apps that consume the most resources. T Android 9 this process is intuitive and takes only a few seconds. Most often, the “heavyweights” are social networks, instant messengers and browsers.
First, you need to go to the main settings menu. Find the section Applications and notifications and select item Information about applications. A complete list of installed software will be displayed here. It is recommended to sort it by size to immediately identify the leaders in memory consumption.
Select the desired application from the list. In the menu that opens, find the section Memory or Storage. You will see two buttons: “Clear data” and “Clear cache”. We are interested in the second option. Clicking on it will delete only temporary files without affecting your logins, passwords or correspondence.
- 📱 Telegram: often accumulates gigabytes of media files, which are best cleaned through the built-in settings of the messenger itself.
- 🌐 Chrome: Browser cache can occupy hundreds of megabytes, slowing down page loading when full.
- 📸 Instagram: Saves feed thumbnails and stories, which quickly turn into digital trash.
- 🎵 Spotify: Caches album covers and track fragments for offline listening.
If the “Clear” button cache" is inactive, this means that the application does not currently store temporary files or they have already been deleted by the system. In this case, there is no need to take additional action. You should focus on those apps where the cache size exceeds 100-200 MB.
Periodically check the storage settings in the applications themselves (for example, Telegram has a “Memory Usage” function), as they often allow you to delete the cache more flexibly than the Android system settings.
Use the built-in “Release” function places"
In version Android 9 Pie Google has introduced a smart tool for automatic storage management. This function analyzes the device and offers to delete unnecessary files, including duplicates, old screenshots and the cache. This is a great option for users who don’t want to dig through the menu manually.
To take advantage of this feature, go to Settings and select Storage. The system will conduct a quick analysis and show a graph of the occupied space. At the top of the screen you will see a “Free up space” recommendation indicating the potential amount of memory that can be returned.
Clicking on this button will take you to the cleaning interface. Here the system will offer to delete unused applications, large files and, importantly, the application cache. You can select categories manually or trust the automatic selection. Confirming the action will start the deletion process.
| Data type | Deletion security | Impact on speed | Clearing frequency |
|---|---|---|---|
| Application cache | High | Positive | Once a month |
| Application data | Low (reset settings) | Neutral | Only in case of failures |
| Downloads | Medium (file checking) | Free up space | As needed |
| System cache | High | High (for failures) | For problems with the OS |
It is important to understand that the built-in tool does not always find deeply hidden system logs. It focuses primarily on user-generated content and obvious garbage. For deep cleaning, you may need to use the engineering menu, which will be discussed below.
⚠️ Attention: The interface of the “Storage” menu may vary slightly depending on the smartphone manufacturer (Samsung, Xiaomi, Huawei), as they often modify the standard one Android.
Deep cleaning via Recovery Mode
If standard methods do not help and the phone continues to work unstable, you should resort to clearing the system cache partition through recovery mode (Recovery Mode). This method deletes temporary files of the operating system itself, which are not accessible through the regular settings menu.
To enter this mode, you must completely turn off your smartphone. Then you need to hold down a certain combination of buttons. On most devices, this is a combination of the power key and the volume down button. On some Samsung models, you may need to connect a USB cable to your computer. Android 9 This is a combination of the power key and the volume down button. Some Samsung models may require you to connect a USB cable to your computer.
When the manufacturer logo or recovery menu appears, use the Volume buttons to navigate up and down, and the Power button to confirm your selection. Find item Wipe cache partition. Be extremely careful: do not confuse it with item Wipe data/factory reset, which will delete all your personal data.
Sequence of actions in Recovery:1. Turn off the phone.
2. Press Power + Volume Down (or Up).
3. Select "Wipe cache partition".
4. Confirm "Yes".
5. Select "Reboot system now".
After confirmation, the system will begin the cleaning process. This will take from a few seconds to a minute. Once completed, the screen will return to the main recovery menu. Select the option Reboot system now to restart the device in normal mode. The first startup may take longer than usual.
What to do if the phone does not enter Recovery?
If the standard button combination does not work, try holding down the power and volume up buttons. Some models require you to connect the device to a charger or PC before turning it on. There are also special utilities for PCs that allow you to enter this mode via ADB.
Storage analysis and removal of hidden garbage
Sometimes the problem of lack of space lies not in the obvious cache, but in hidden folders and remnants of deleted apps. Android 9 has a built-in file manager, but for in-depth analysis it is better to use specialized utilities or careful manual browsing.
Pay attention to the folder Android/obb i Android/data. Cache files of heavy games and applications are stored here. If you deleted a game but forgot to empty this directory, gigabytes of data could remain as dead weight on your disk. You should only delete the contents of these folders if you are sure that the corresponding applications are no longer needed.
Also check the folder Thumbnails in the directory DCIM. The gallery creates thumbnails for all photos and videos. Over time, the file .thumbnails can grow to incredible sizes. It can be safely deleted, but the system will create it again the next time you open the gallery.
- 🗑️ .trash folder: in many file managers, deleted files first go to the trash, continuing to take up space.
- 💬 Messenger databases: WhatsApp and Viber create backup copies that can be duplicated.
- 📦 APK leftovers: installation files of downloaded apps often remain in the downloads folder.
Regular audit of the file system helps keep things in order. Don't be afraid to delete folders with the names of deleted applications. However, system directories, such as System or Vendor, should absolutely not be touched - this will lead to the device not working.
Manually cleaning the OBB and Data folders is most effective for freeing up space after uninstalling heavy games, but requires care so as not to erase the data of the necessary apps.
Frequent mistakes and precautions
When trying to optimize a smartphone, users often make mistakes that can lead to data loss or system instability. The main mistake is using aggressive “cleaner” applications from the Play Market. Many of them not only are not useful, but also generate a cache themselves by showing ads and collecting data.
Another common mistake is resetting all application data instead of clearing the cache. Pressing the button Clear data returns the app to the “as after installation” state. You will lose settings, login and local saves. Use this function only in extreme cases when the application does not work correctly.
You should also not try to clear system files through file managers with root access, unless you have sufficient qualifications. Deleting even one important configuration file from the system partition can lead to a “bootlap” (infinite reboot).
⚠️ Attention: Interfaces and menu item names may be updated with security patches. If you do not find the item described, check the official information from the manufacturer of your device.
Remember that RAM (RAM) and built-in memory (ROM) are different things. Clearing the cache frees up disk space, but does not always directly affect the amount of free RAM, although it indirectly improves overall performance.
FAQ: Questions and answers about clearing the cache
Will clearing the cache delete my photos and contacts?
No, clearing the cache (both through application settings and through Recovery Mode) affects only temporary technical files. Your personal data, such as photos, contacts, messages and installed applications, will remain completely safe.
How often should you clear the system cache on Android 9?
In modern versions of Android there is no need to do this regularly. It is enough to carry out the procedure once every few months or only if you notice obvious problems with the phone’s operation, such as freezes or errors during updates.
Why did the phone begin to work slower after clearing the cache?
This is a temporary phenomenon. After deleting the cache, the system and applications take time to recreate the necessary temporary files and index the data. Typically, performance is restored within several hours of active use.
Is it possible to clear the cache of all applications at once with one button?
In the standard settings menu Android 9 there is no such function. You need to log into each application separately. However, the “Free up space” function in the “Storage” section allows you to delete the cache of several applications en masse.
What to do if the Wipe Cache Partition item is missing in Recovery?
On some new devices, manufacturers hide this option, since the system manages the cache automatically. In this case, rely on cleaning through the app settings and the built-in Free up space tool.