When deeply analyzing the memory of your smartphone or tablet, you probably noticed strange folders and files with the extension .obb, occupying gigabytes of precious space. Many users get scared when they see huge amounts of data in system directories and do not understand whether they can be deleted without harming the operation of the device.
In fact, these files are critical components for the operation of modern mobile games and heavy applications. They are containers with additional resources that developers have moved outside of the main APK installation package for technical reasons.
In this article, we will examine in detail the nature of this data, explain why it is necessary, and provide clear instructions on how to safely manage it. You will learn to distinguish system files from garbage and understand how to correctly transfer or clean up this partition without losing progress in games.
What is an OBB file and why do you need it?
The abbreviation OBB stands for Opaque Binary Blob, which can be translated as “opaque binary object." In simple words, this is an archive containing media resources that do not fit into the standard application installation file.
Google has introduced a limit on the size of the main file APK, which can be downloaded directly via Google Play. Initially, this limit was 50 MB, later increased to 100 MB. However, modern games with high-resolution graphics weigh much more.
To get around this limitation, developers use files OBB as an extension of the main application. They store textures, audio tracks, videos and level maps. Without this data, the game simply will not start or will display a black screen instead of graphics.
Using a separate container allows you to update game content without having to download all of it APK. This saves user traffic and simplifies the process of keeping the application up to date on millions of devices.
⚠️ Attention: OBB files are tied to a specific application package. If you copy the OBB folder from one game to the folder of another, nothing will happen because the data structures are incompatible.
If you download the game as an APK + OBB manually (not through the Play Market), make sure that the file versions match. Old OBB with a new APK often leads to application crashes.
Where OBB files are stored on a smartphone
The standard location for all additional application data in the operating system Android is strictly regulated. The files are located in the root directory of the internal memory or on the SD memory card.
The full path to the storage is as follows: /Android/obb/. Subfolders are created inside this folder, the names of which correspond to the package names of applications, for example com.rockstargames.gtasa.
Starting with version Android 11, access to this directory for third-party file managers has been significantly limited for security purposes. The system now isolates application data to prevent unauthorized access to sensitive information.
To view content, you may need to use the built-in file manager with advanced rights or use your computer through a connection. USB. In some cases, you may need to grant special permissions through system settings.
Why is the Android/obb folder hidden in new versions?
Starting with Android 11, Google has implemented a Scoped Storage policy. This means that applications cannot freely scan the entire file system, but only have access to their own data. This protects the user from ransomware viruses and data theft, but complicates manual management of OBB files.
Differences between OBB files and cache and application data
Users often confuse a folder OBB with a folder data or a regular cache. Although they are all located in the directory /Android/, their purpose and contents are radically different.
The folder data contains user settings, saving progress, logins and databases. Deleting this folder will reset the application to its factory state and lose all your achievements.
The cache (cache) stores temporary files to speed up work. You can safely clear it; the application will simply download the necessary images or scripts again the next time you start it.
In contrast to them, OBB are static resources. They do not change during the game (except for rare cases of resuming content). These are “heavy” files that lie dead until you launch the application.
| Data type | Location | What's inside | Can I delete |
|---|---|---|---|
| OBB | /Android/obb/ |
Textures, music, video | Only when deleting the game |
| Data | /Android/data/ |
Saves, settings, accounts | No (reset progress) |
| Cache | /Android/data/.../cache |
Temporary thumbnails, scripts | Yes, safe |
The main rule: OBB is the body of the application, Data is your soul (progress), Cache is temporary garbage. Delete wisely.
How to safely delete OBB files to free up memory
If the internal memory of your smartphone is full, and games that you haven’t played for a long time are taking up space, you can delete them. However, this must be done correctly so as not to disrupt the operation of the system.
The most reliable way is to use the standard settings menu Android. This ensures that all associated files are deleted, including entries in the system registry.
Go to the Settings → Applicationssection. Find the unwanted game or app in the list. Click on it and select the button Delete.
The system will automatically clear not only the application shortcut, but also the entire folder with resources OBB, as well as user data. This prevents the appearance of "phantom" files that take up space but are not associated with the app.
- 🗑️ Go to the storage settings and sort applications by size to find the biggest memory hogs.
- 📂 Use the file manager only if the application has already been deleted, but the folder remains (this happens when failures).
- 💾 Before manual deletion, copy important folders to your computer if you doubt their purpose.
☑️ Check before deleting OBB
Manual installation of games with OBB files
Sometimes it becomes necessary to install the game manually by downloading APK and archive OBB from a third-party resource. This is relevant for regions where the application is not available in the official store, or for installing modified versions.
The process requires care. First you need to install the file itself APKbut do not run the application after installation. If you run an empty application, it may create an empty folder or throw an error.
Then you need to unpack the downloaded archive .zip or .rar, which contains a file with the extension .obb. This file must be placed strictly along the path: /Android/obb//.
The folder name must exactly match the name of the file inside. For example, if the file is called main.123.com.game.obb, then the folder should be called com.game. Any mistake in the name will result in the game not seeing the resources.
⚠️ Attention: When installing manually, make sure that the source of the files is reliable. OBB files may contain malicious code disguised as game resources, although this is less common than in executable files.
After copying the files, you can launch the game. When you first start the application, it will check the integrity of the data. If everything is done correctly, the download will begin immediately.
Transferring OBB files to an SD memory card
Owners of smartphones with a small amount of built-in memory often try to transfer files OBB to a microSD card. In older versions Android (up to 6.0-7.0) this was a standard feature.
In modern versions of the system, application developers can prohibit installation on external media. In addition, working with an SD card is slower, which can cause freezes and long loading times in games.
If your device and specific application support this feature, you can change the installation location through the settings. Go to Settings → Storage and select the memory card as the main location for recording new data.
For already installed games, try using the “Move to SD card” function in the application properties menu. Please note that usually only part of the data is transferred, and critical files may remain in the internal memory.
The use of a class memory card U3 or V30 is highly recommended for gaming. Slow class cards C10 may not be able to cope with streaming texture loading in real time.
⚠️ Attention: If you format the memory card as internal storage (Adoptable Storage), the data on it will be encrypted. Taking out such a card and inserting it into another phone or computer without formatting will not work - the data will be inaccessible.
Why do games slow down from an SD card?
The random read speed (IOPS) of most memory cards is much lower than that of built-in flash memory (eMMC or UFS). Games constantly access thousands of small files. If the card does not have time to transfer data, the processor waits and the game freezes for a split second.
Frequent problems and errors when working with OBB
Even with correct installation, users may encounter errors. The most common of these is the message “Failed to verify license” or endless loading of resources.
This often happens if the file OBB is damaged during download or has an incorrect checksum. In this case, completely reinstalling the application and clearing the cache helps.
Another problem is lack of space. OBB files are downloaded to a temporary folder and then unpacked. For a successful installation, you must have free space twice as large as the OBB file itself.
There are also version conflicts. If you updated the game through the store, but left the old OBB file from the pirated version (or vice versa), the application will not launch. Always synchronize versions of APK and additional data.
- 🔄 "Loading resources" error: check your internet connection and disk space.
- 🚫 "Application not installed" error: the OBB file may be in the wrong folder or has the wrong name.
- 💥 Crashes on startup: try deleting the application cache without touching the data and OBB.
Is it possible to delete all files from the Android/obb folder right away?
Technically, you can delete the entire contents of this folder through a file manager with superuser rights or through a PC. However, this will cause all installed games and applications that use additional data to stop running. You'll have to re-download gigabytes of data for each app the first time you launch it. Do this only if you want to completely clear your phone of games.
Why does the OBB folder weigh more than the game itself in the store?
The application store often indicates the compressed size of the download file. The OBB file on the device is already unzipped and ready to use, so it takes up more space. In addition, during the game, additional resources that were not included in the original package may be downloaded.
How can you find out which game belongs to a file with an unclear name in OBB?
The folder name usually corresponds to the developer's domain name in reverse order (for example, com.king.candycrush). You can enter this name into a search engine to find out the affiliation. Also, many advanced file managers show an application icon next to the data folder.
Does deleting OBB affect saves in the game?
No, OBB files contain only resources (pictures, sounds). Progress saves are stored in a folder data or in the cloud. By deleting OBB, you will not lose your level or achievements, but the game will not be able to start until you download the resources again.
Do you need Root to manage OBB files on Android 11+?
For standard access through the built-in file manager, Root is not needed, but access will be limited. Third-party managers (such as Total Commander or Solid Explorer) request special permission to access the Android folder when first launched on new versions of the system. root access give full control, but are not required for simple copying or deletion.