Over time, any smartphone begins to work slower, applications take longer to open, and the system periodically freezes. The main reason for this behavior is the overflow of internal memory and the accumulation of digital garbage, which inevitably forms during active use of the device. If you are wondering how to clean your Android phone of unnecessary files, then a comprehensive approach to deleting temporary data will be the key to returning to its former performance.
Many users mistakenly believe that to clean they need to install third-party cleaner applications, which often consume resources themselves and display intrusive ads. In fact, modern versions of the operating system Android have built-in powerful maintenance tools that allow you to safely remove unnecessary things without the risk of damaging system files. In this material, we will look in detail at all the ways to free up space, from manually deleting the cache to using hidden debugging functions.
Analyzing occupied space and searching for large files
Before you start deleting data, you need to understand what exactly is taking up space in the memory of your gadget. Standard system tools allow you to quickly identify space “eaters,” which often turn out to be forgotten videos, instant messenger backups, or caches of streaming services. Go to menu Settings → Storage (or Memory) to see a detailed diagram of data distribution by category.
Pay special attention to the “Other” section or “System files”, where remnants of deleted apps or error logs may be hidden. Some shells, for example MIUI or One UI, have a built-in analyzer that itself offers to remove duplicate photos or rarely used applications. Files larger than 100 MB located in the downloads folder are often installers of applications that are no longer needed after installing the apps.
Manual sorting allows you to make an informed decision about what is really important to keep and what can be sent to the trash without regret. You should not rely only on automatic recommendations, as the algorithm may consider important your personal documents that you created a long time ago, but you no longer need them.
- 📂 Check the
Downloador "Downloads" folder for old APK files and documents. - 📸 Browse the gallery and delete burst photos, taken in burst mode.
- 🎵 Find music downloaded from social networks or instant messengers, which is often duplicated.
- 📹 Sort video files by size and delete long videos that can be transferred to your computer.
Cleaning application cache and system garbage
Cache is temporary data that applications save to load content faster when accessed again. Although the cache is noble, over time it can grow to gigabytes, especially for social networks and browsers. Clearing the cache does not delete your logins, passwords or correspondence, it only resets temporary files, forcing the application to download them again if necessary.
To perform this operation, go to Settings → Applications and select a specific app. Inside the application menu, find the “Storage” item and press the Clear cachebutton. It is important not to confuse this function with the “Clear data” button, as it will completely reset the application to its factory state, deleting all your settings and authorizations.
⚠️ Attention: Do not use the “Clear data” function for messengers like Telegram or WhatsApp if you do not have a recent backup copy of your correspondence, otherwise you may lose your entire message history.
The system cache can be cleared through the Recovery menu, but this requires rebooting the device and performing certain actions using the volume buttons. For the average user, it is safer to limit yourself to clearing the cache of individual heavy applications or using the built-in optimizer, if provided by the manufacturer.
The browser cache can be cleared faster through the app itself: go to the history and select “Clear history”, making sure that the “Images and other files” checkbox is checked.
Deleting temporary files and app remnants
When deleting applications, the system often leaves empty folders or configuration files that are no longer used, but continue to take up space. In addition, various services create temporary files during operation, which they forget to delete after the task is completed. To search for such “tails” you can use a file manager, for example Files by Google or the built-in explorer.
In the Android file system there are standard directories where garbage accumulates. The folder Android/obb contains cache data for games, and if you delete a game, the folder with its name may remain. The situation is similar with the folder Android/datawhere application working data is stored.
Regular checking of these directories allows you to keep the system clean. However, when manually clearing folders in the section Android you need to be extremely careful not to delete data from current applications that you plan to use.
- 🗑️ Delete folders with the names of already deleted games in the directory
Android/obb. - 📄 Check the root of the internal memory for files with the extension
.tmpor.log. - 📱 Find folders from deleted applications (for example, from old photo editors) and delete them.
☑️ Weekly memory check
Working with garbage in instant messengers and social networks
The leaders in memory consumption on any smartphone are messengers Telegram, WhatsApp i Viber. These apps automatically download all received images, videos, and voice messages, storing them in your device's memory even after you've viewed them. Without regular cleaning, correspondence in one chat can take up several gigabytes.
Inside the settings of each messenger there is a “Data and Memory” or “Storage” section, where you can see chat statistics. Telegram, for example, allows you to configure automatic cache clearing: you can specify that media files older than 3 days or 1 week are deleted automatically, while remaining available in the cloud.
WhatsApp stores all received media files in a shared folder, and you need to clean it either through the built-in storage management, or manually through the file manager, deleting the contents of the folders WhatsApp/Media. Social networks like VK or Instagram also cache viewed feeds, which can take up a significant amount of space.
⚠️ Attention: The storage settings interface in messengers may differ depending on the version of the application. If you do not find the described items, check the current menu location in the help of the specific application.
Cleaning garbage in instant messengers gives the most noticeable increase in free space. Users are often surprised to find that after clearing the instant messenger cache, 5, 10 and even 20 GB of memory are freed up.
Why do instant messengers take up so much space?
Messengers save copies of all sent and received files locally for quick access. In addition, they often store multiple copies of the same image: the original, a compressed version for preview, and a thumbnail.
Using built-in tools and developer mode
Android has a hidden section for developers that can help clean up the system. By activating this mode (by clicking on the build number 7 times in the “About phone” section), you gain access to advanced settings. In particular, there you can find items for limiting background processes, which indirectly affects the amount of garbage created.
Also in the menu for developers there is a “Do not save activity” function, which forces the system to destroy background processes immediately after exiting the application. This is a drastic method that may slow down multitasking, but it is guaranteed to clear RAM tails.
Built-in cleaning tools like Device Care on Samsung or Cleanup on Xiaomi work well enough for basic maintenance. They remove temporary files, installer remnants and unused packages without requiring the user to have deep knowledge of the file system.
| Cleaning method | Security | Efficiency | Risk of data loss |
|---|---|---|---|
| Built-in cleaner | High | Medium | Minimum |
| Manual cache deletion | High | High | Absent |
| Third-party cleaners | Average | High | Medium (advertising) |
| Factory reset | High | Maximum | Total loss |
Built-in Android tools today are more effective than third-party applications, since they have deep access to system processes without the need to obtain root access.
Radical measures: resetting and formatting
If none of the soft methods helped free up critical space, the last option remains - a full reset to factory settings. This procedure completely clears the internal memory, deleting all applications, photos, contacts and settings, returning the phone to its out-of-the-box state.
Before performing this operation required create a backup copy of your important data to cloud storage Google Drive or to your computer. The reset process can be started through the menu Settings → System → Reset settings or through the recovery menu (Recovery Mode) if the phone does not boot.
After the reset, the phone will work as quickly as possible, since there will be no years of accumulated garbage, file conflicts and database fragmentation. This often helps, even on older devices, to extend the period of their comfortable use for another year or two.
Is it safe to use cleaner applications from the Play Market?
Most popular cleaners are safe, but they often work aggressively, closing background processes, which Android then immediately opens again, using up battery power. In addition, many of them are overloaded with advertising. Google's built-in Files tool is usually sufficient for 99% of users.
Can clearing the cache speed up your phone?
Yes, if the cache is damaged or takes up almost all the free memory. If there is space, clearing the cache can even temporarily slow down the launch of applications, since the system will have to re-create temporary files.
Where do the photos go after clearing the gallery cache?
Clearing the gallery cache deletes only thumbnails and index files. Your original photos and videos remain in place and do not disappear anywhere.