Many smartphone users, trying to free up precious space in the internal memory, sooner or later come across a mysterious directory Android. Hidden inside it are folders data and obb, sometimes occupying gigabytes of space. The intuitive desire to click “delete everything” can lead to the inability of your favorite games and loss of app settings. It is necessary to clearly understand the architecture of the file system so as not to harm the device.
This system directory is a “warehouse” for user application data that should not be stored in shared memory. This contains cached images, saved game progress, downloaded maps for navigation, and offline content from streaming services. Let's look in detail at whether these files can be touched and how to properly manage this storage without losing important information.
Purpose of the Android system directory
The directory /sdcard/Android was introduced by the operating system developers for structured storage of third-party application data. Previously, apps could scatter their files around the root of the internal memory, creating chaos. Now everything is organized: each application receives its own personal box with a unique package name, for example com.instagram.android or com.supercell.clashofclans.
Inside this folder there is data that are not critical to start the system, but are necessary for the correct operation of the software. Deleting the contents of this directory through a file manager often results in the next time the app starts downloading everything again or resetting the settings to factory settings. This is similar to clearing the browser cache, only on the scale of all installed apps.
It is worth noting that starting from version Android 11, access to this folder for third-party file managers was significantly limited by security policies. Scoped Storage. Now you can't just go in and delete files from someone else's application without special permissions or connecting to a PC. This is done to prevent viruses and incompetent users from erasing other people's data.
⚠️ Attention: When clearing this folder, you may lose progress in games that do not use cloud saves, as well as offline maps and downloaded movies. Always check for backups before mass cleaning.
The structure of the Data folder and its contents
The main part of user garbage accumulates in the subdirectory data. Here, each application creates a folder with the name of its package. Inside these folders there are usually subdirectories cache and files. The cache stores temporary data: image thumbnails, temporary downloads, video player clipboards. These files can be deleted, but the application will create them again if necessary.
The folder files contains more important data. This is where apps save user settings, messenger databases, downloaded documents and offline content. For example, if you listen to music in Spotify or Yandex.Music without the Internet, the tracks are located here. Deleting this directory is tantamount to reinstalling the application with the loss of all local settings.
The size of these folders can reach tens of gigabytes, especially for messengers like Telegram or WhatsAppthat cache all viewed media files. Also, navigator maps Google Maps or Yandex.Navigatortake up a lot of space. Understanding which folder belongs to which application helps to free up space in a targeted manner without breaking the system.
How to find out whose folder it is?
The folder name usually matches the name of the application package. For example, com.facebook.katana belongs to Facebook, and com.viber.voip belongs to the Viber messenger. If you are not sure, it is better not to touch a folder with an unfamiliar name so as not to disrupt the operation of system services.
Differences between the OBB and Data folders
Many users confuse the folders data and obb, considering them duplicates. In fact, they have different functions. The directory obb (Opaque Binary Blob) is intended for storing large additional files of games and heavy applications. These are resources that are not placed in the main APK file during installation: high-quality textures, 3D models, audio tracks and videos.
If you delete the contents of the folder obb for a specific game, it will simply stop launching or give an error loading resources. The app will have to re-download gigabytes of data the first time you log in, which can take hours on a slow Internet connection. Unlike the cache in the folder data, files in obb are required for the operation of heavy software.
Usually games with advanced graphics, such as PUBG Mobile, Genshin Impact or Call of Duty, use this particular directory. Light utilities and simple games can do without the obb folder, storing everything in data. Checking the presence of this folder helps you understand which games take up the most disk space.
| Characteristics | Data folder | OBB folder |
|---|---|---|
| Main purpose | Settings, cache, user files | Game resources (textures, models) |
| Consequences of deletion | Reset settings, loss of cache | Inability to launch the application |
| Content type | Temporary and permanent data | Static game resources |
| Change frequency | Constantly updated | Changes rarely (when updating the game) |
If the game requires a lot of space, check obb folder Often this is where the main files weighing 2-3 GB are stored, which can be transferred to a memory card (if the application supports) or deleted when deleting the game itself.
Safe cleaning and freeing up space
The safest way to clear space is to use the system's built-in tools. In your phone settings, go to Applications, select the desired app and press Storage. There you will see the “Clear cache” and “Clear data” buttons. The first one removes temporary garbage, the second one resets the application to its original state. Use these tools instead of manually deleting files through Explorer.
If you still decide to clean the folder manually through a computer or an advanced file manager with root access, act selectively. Delete the contents of folders only for those applications that you have already deleted from the system, or those in which you are not interested in saving progress. For example, you can safely clear the browser cache or temporary files of the photo editor if the current project is saved.
For messengers, it is better to use the built-in cache clearing function in the settings of the application itself. In Telegram, for example, there is a convenient Memory Usage tool that allows you to delete the cache while leaving all chats and media files available for re-downloading upon request. This is more effective than manually digging through system folders.
☑️ Safe memory clearing
Access problems in new versions of Android
Starting from Android 11 and above, Google has tightened its access policy file system. Standard explorers, such as Samsung's My Files or Xiaomi's built-in file manager, may show the folder Android/data empty, even if there are files there. This is not an error, but protecting the confidentiality of application data from other apps.
To access this data without root access, you can use a special trick through the app Files by Google or install specialized managers like Solid Explorer or X-plorethat request special permission to access system folders. When you first log in, the system will prompt you to confirm.
An alternative method is to connect your smartphone to your computer in file transfer mode (MTP). Through the Windows or macOS interface, access to the folder Android/data often remains open, which allows you to conveniently manage files from the big screen. However, the transfer speed may be lower than when working directly with the device.
⚠️ Attention: Settings interfaces and menu item names may differ depending on the manufacturer's shell (MIUI, OneUI, ColorOS). If you don't find the item you need, use the search in your phone settings.
Restricting access to the Android/data folder is a security measure, not a bug. It protects your personal data from malware that could steal information from other applications.
What to do if the folder takes up too much space
If the analysis showed that the folder Android has grown to incredible sizes, first of all check whether you have accidentally installed an application that generates logs or errors in a loop. Sometimes a faulty app can write gigabytes of debugging information to text files, filling up memory in a matter of hours.
It is also worth paying attention to streaming services and podcasts. Users often forget that they have downloaded seasons of TV series or hundreds of podcast episodes to listen to on the subway. These files are stored in data or obb. Regular auditing of downloaded content will help keep memory under control without deleting the applications themselves.
As a last resort, if the phone is unstable and you suspect corruption of the files in this directory, you can delete the contents of the folder of the specific problematic application. The next time you start it, it will recreate the necessary structure again. This action is equivalent to reinstalling the application without deleting it from the list of apps.
Is it possible to delete the entire Android folder?
No, you cannot delete the root folder Android completely. This may lead to incorrect operation of the system, loss of data from all applications and the need to reset the phone to factory settings. Delete only the contents of the folders of specific applications that you do not need.
Why do they appear again after deleting files?
Applications automatically restore the necessary files when launched. If you deleted the cache, the app will download it again from the Internet. If settings are deleted, it will create new default configuration files. It only makes sense to delete what you don’t need (for example, the cache of a deleted game).
How to transfer the Android folder to a memory card?
In modern versions of Android, transferring the system folder Android/data to a memory card is impossible without root access and complex manipulations with mounting. Applications by default write data to internal memory for speed. Formatting a card as internal memory (Adoptable Storage) is not supported by all manufacturers.
Is it safe to use cleaning applications like Clean Master?
The use of aggressive cleaners is not recommended. They often delete necessary files, disrupting the operation of applications, and display intrusive advertisements. It is better to use Android's built-in cleaning tools or reliable tools like Files by Google, which act more accurately.
Where are photos from WhatsApp and Telegram stored?
In new versions of Android, messenger media files have often moved from the shared folder to the depths of the directory Android/media or Android/data. For example, a Telegram photo can be found along the path Android/data/org.telegram.messenger/files/Telegram/Telegram Images. This complicates direct access, but increases privacy.