Owners of smartphones based on Android often face a situation where the internal memory is full and the device starts to work noticeably slower. Manufacturers often install a lot of pre-installed apps that are not used by the owner, but continue to take up space and consume processor resources. Understanding what can be safely deleted and what should absolutely not be touched is the key to maintaining high gadget performance.
In this article, we will take a detailed look at the storage structure of your device. You'll learn to distinguish critical system components from digital junk. We will look at both standard cleaning methods through settings, as well as more advanced methods that require connecting to a computer. It is important to approach the issue of deletion consciously so as not to turn the phone into a “brick.”
Before taking radical measures, it is necessary to audit the installed applications and files. Often, users are not even aware of how much space temporary files or duplicate media take up. Proper cleaning can restore your smartphone to its former speed without the need to purchase a new model. Let's start with the most obvious and safest - custom applications.
Deleting custom applications and games
The easiest and safest way to free up space is to delete apps that you downloaded yourself from Google Play or third-party stores. Over time, the list of games and utilities grows, and many of them simply gather dust on the screen, consuming precious megabytes. The standard uninstall mechanism Android is completely safe and will not disrupt the operation of the operating system.
To uninstall, just go to the settings, find the section Apps and select unnecessary software. However, many manufacturers install their shells, where this path may differ. For example, the Xiaomi or Samsung menu may be hidden deeper in the system. If an app is not uninstalled through the normal interface, it may have device administrator rights that need to be revoked first.
Pay attention to the cache size before uninstalling. Sometimes an application takes up 50 MB, but its cache has grown to 2 GB due to accumulated temporary data. In this case, you can first try clearing the cache through the menu Storage of a specific application. If this does not help or the app is no longer needed, feel free to uninstall it.
- 🎮 Games that you have not played for more than a month - they often contain heavy graphic resources.
- 🛒 Marketplace applications, if you rarely make purchases - it is easier to reinstall them when necessary.
- 📱 Social networks-clones (Lite versions), if you use the main applications.
- 🧹 Third-party “cleaners” and antiviruses - built-in tools Android do the job better.
⚠️ Attention: Before deleting messengers like WhatsApp or Telegram be sure to create a backup copy of your chats, otherwise the entire chat history will be lost forever.
Working with the system cache and temporary files
The operating system Android during the work process creates many temporary files to speed up launch apps and load web pages. Over time, this data becomes outdated and turns into ballast. Clearing the cache is a regular procedure that is recommended every few months to maintain stability.
The cache is divided into several types: application cache, system cache and browser cache. You can clear the cache of a specific application in its properties. This action will not delete your personal data, logins or passwords, but will only reset temporary files. If the application starts to work incorrectly after clearing the cache, try also clearing its data, but then you will have to configure the app again.
To clear the system cache on some devices you need to enter the mode Recovery. This is a more complex procedure that is performed by a combination of physical buttons when you turn on the phone. In the recovery menu, select Wipe Cache Partition. This operation is safe for user data, but requires caution when navigating the menu.
Use Google's built-in Files utility or a manufacturer's equivalent to find duplicates and large files - it's faster than going through folders manually.
Browsers also accumulate gigabytes of garbage. If you actively surf the Internet, the cache Chrome or Firefox can occupy a significant part of the memory. Regularly clearing history and cookies will not only free up space, but also increase the confidentiality of your data online.
Removing pre-installed software (Bloatware)
One of the most painful topics for users is Bloatware a set of pre-installed applications from the smartphone manufacturer or telecom operator. Often these apps cannot be removed in the standard way; the “Delete” button in the settings is inactive. They work in the background, consume RAM and irritate with notifications.
There are several methods to combat such software. The simplest one is to disable the application through the settings. In the menu Applications select an unnecessary app and press Disable. After this, it will disappear from the list of installed ones and will no longer start, although it will physically remain on the system partition. This is a safe method that does not require root access.
A more advanced method involves using the tool ADB (Android Debug Bridge) via a computer. This method allows you to completely remove system applications for the current user. To do this, you need to enable USB debugging in the menu For developers and execute a special command in the terminal on the PC.
adb shell pm uninstall -k --user 0 application package nameUsage ADB gives full control, but requires care. Removing critical components such as SystemUI or services Google Playwill result in the phone not working. Therefore, before deleting, be sure to find out the purpose of the package on the Internet.
How to find the name of the application package?
Install the App Inspector application or Use adb shell dumpsys window windows | grep -E 'mCurrentFocus|mFocusedApp' to see the package name of the active window.
Cleaning media files and downloads
Photos, videos and downloaded files often take up the lion's share of internal memory. The folder Download over time turns into a dump of installation files APK, viewed documents and forgotten pictures. Manual revision of this directory is one of the most effective ways to quickly free up several gigabytes.
Many users forget about the functions of cloud storage. Services like Google Photos allow you to configure automatic uploading of pictures to the cloud with subsequent deletion of local copies. This frees up space on the device while maintaining access to the archive via the Internet. It is important to check the quality of the upload so as not to lose details of the pictures.
It is also worth paying attention to messenger folders. Telegram and WhatsApp by default, they save all received photos and videos to the phone’s memory. In the settings of these applications, you can disable autosaving of media to the gallery. Already accumulated files can be deleted through the built-in cleaning tools inside the messenger itself by selecting the period or file type.
| File type | Where to look | Can I delete | Risk of data loss |
|---|---|---|---|
| Installation APK | Download folder | Yes, after installation | No |
| Thumbnail cache | .thumbnails | Yes, the system will recreate it | No (will slow down the opening of the gallery) |
| .log files | System root / application folder | Yes | No |
| Folder Android/obb | Game data | Only if the game was deleted | High (the game will not start) |
⚠️ Attention: File manager interfaces differ on different firmwares (MIUI, OneUI, ColorOS). The location of the folders may differ from the standard path Android. Check the folder structure in the official manual for your model.
Storage analysis and hidden folders
Sometimes the memory is full of files whose existence the user is not even aware of. These could be error logs, remnants of uninstalled apps, or caches of streaming services. To identify such “hidden space eaters”, it is recommended to use specialized disk analysis utilities, such as DiskUsage or Files by Google.
These applications visualize storage as a map, where the size of the rectangle corresponds to the file size. It immediately becomes clear that, for example, the folder with the map cache Google Maps has grown to obscene sizes, or a forgotten movie takes up 4 GB. This visual approach allows you to selectively remove unnecessary items without affecting important data.
Special attention should be paid to the folder Android/data. It stores application data. Previously, users could freely clean its contents, but in new versions Android (starting from version 11), access to this folder for third-party file managers is limited for security reasons. Cleaning is possible only through the settings of a specific application or using the system explorer.
Visual analysis of the disk helps to find files that are not displayed in the standard “Storage” menu in the phone settings.
What you ABSOLUTELY CANNOT be deleted
In the pursuit of free space, it is important not cross the line, followed by the collapse of the system. There are a number of directories and files, the deletion of which will lead to a bootloop (infinite reboot) or complete inoperability of the smartphone. If you are not an experienced developer, avoid these areas.
Never delete files from the system root folder unless you know their exact purpose. Especially dangerous are files with the extension .so (libraries), .odex (optimized application code) and configuration files in the folder /system/etc. Even one deleted driver file can disable the communication module or touch screen.
Also, do not touch folders related to accounts and security. Deleting encryption keys or authentication files may permanently block access to your data. If the system warns that an action may lead to unstable operation, heed this warning.
- 🚫 Folder
/system—the core of the operating system, any intervention is fatal without backup. - 🚫 Files
build.prop—contain critical parameters device configuration. - 🚫 Modem and radio module drivers - removal will deprive communication and the Internet.
- 🚫 Services Google Play - will disrupt the operation of the store, maps and synchronization.
⚠️ Attention: Removal system files often require superuser rights (Root). Obtaining these rights will automatically void the device warranty and may make it impossible to use banking applications.
Questions and answers (FAQ)
Is it safe to delete the .thumbnails folder?
Yes, it is safe. This folder stores thumbnails of images for quick display in the gallery. Once deleted, the system will automatically re-create them the next time you open the gallery, which may temporarily slow things down, but will free up space.
Can you remove system app updates?
Yes, you can roll back system apps (such as the browser or YouTube) to the factory version through Settings. This will free up space taken up by updates. However, you will lose new features and security patches until the system is updated again.
What should you do if your phone restarts after deleting an app?
You most likely deleted a critical system component. Try booting into safe mode and uninstalling recently installed managers or themes. If this does not help, you will need to reset to factory settings via the Recovery menu.
Why do you need root access to remove system garbage?
The partition /system is read-only by default. Superuser rights (Root) remove this protection, allowing you to make changes to system files. Without these rights, you can only disable applications, but not physically delete them.
Does deleting the cache erase my photos and contacts?
No, clearing the cache only affects temporary technical files. Your personal data such as photos, contacts, messages and notes remain completely safe. To delete personal data, you need to select the “Clear data” option.