Android/obb folder: contents, purpose and safe management

The folder Android/obb is one of the most mysterious directories in the smartphone’s memory. Users often encounter it when clearing memory or transferring data, but few understand its real purpose. If you've ever wondered why some games take up gigabytes of space despite the modest size of the APK file, the answer lies right here.

This folder is closely related to the operation of modern mobile applications, especially games with high-quality graphics. It stores additional resources that are downloaded separately from the main APK - textures, levels, sound files and other data. But how exactly does it function? Can it be deleted, moved or edited without risk to the system? Let's take a closer look.

Unlike the folder Android/datawhere the settings and application cache are stored, the content obb is not always obvious. It can occupy tens of gigabytes, but remain “invisible” to standard file managers. This creates confusion: users are afraid to touch the folder for fear of failures, or vice versa - they mindlessly clear it, losing progress in games.

In this article we will reveal all the nuances of working with Android/obb: from file structure to memory optimization methods. You will learn how to distinguish important data from garbage, how to correctly transfer files to a memory card, and what to do if a folder suddenly disappears. And at the end - answers to the most frequently asked questions from users.

What is the Android/obb folder and why do you need it?

Folder Android/obb (from English Opaque Binary Blob - "opaque binary object") was introduced Google as part of the application extension mechanism. Its main task is to store large files that are not practical to include in the main APK. For example, a game weighs several gigabytes, but its APK file takes up only ~100 MB. The rest of the data is loaded into Genshin Impact weighs several gigabytes, but its APK file is on Google Play It only takes up ~100 MB. The remaining data is loaded into obb after installation.

This approach solves several problems:

• 📦 APK size limit: Google Play previously limited APK files to 100 MB (now 150 MB for most applications). The folder obb allows you to bypass this limitation.
• 🔄 Content update: Developers can update resources (for example, new levels in a game) without releasing a new version of the APK.
• 🎮 Cross platform: One APK can load different files for devices with different screen resolutions or processor architectures. Cross-platform data-i="59">). They are archives with encrypted or compressed data that the application unpacks on the fly when first launched. For example, in a game .obb-files for devices with different screen resolutions or processor architectures.

Files in this folder usually have the extension .obb or .zip (less often - .pak, .dat). They are archives with encrypted or compressed data that the application unpacks on the fly when first launched. For example, in the game PUBG Mobile file main.100.com.tencent.ig.obb contains all 3D models, textures and sounds.

It is important to understand that the folder obb is not part of the system Android this is a standard convention for developers. Some applications may ignore it and store data in other places (for example, Android/data or even in the root of memory). However, most major games (from Call of Duty Mobile to Honor of Kings) actively use it. obb.

Folder structure: what files are stored there

Inside Android/obb you will find files named according to the pattern: [main|patch].[version].package name.obb. For example:

• main.1.com.gameloft.android.ANMP.GloftA9HM.obb — the main data file for the game Asphalt 9.
• patch.2.com.ea.game.pvzfree_row.obb — update (patch) for Plants vs. Zombies 2.

Let's look at the components of the name:

1. Prefix (main or patch): indicates the file type. main — basic data, patch — additions.
2. Version (number after the dot): file serial number. When updating the application, main.2...may appear, and main.1... become unnecessary.
3. Name package: unique identifier of the application (for example, com.activision.callofduty.shooter for Call of Duty Mobile).

The contents of the files depend on the type of application:

Application type	What is stored in OBB	Approximate size
3D games	Textures, models, animations, sounds	1–10 GB
2D games	Sprites, background music, levels	50–500 MB
Navigators	Offline maps, voices for navigation	100 MB - 2 GB
Video editors	Templates, filters, effects	200–800 MB
Social networks	Stickers, AR masks (rarely)	up to 100 MB

Interesting fact: some applications (for example, Google Earth) store in obb not only data, but also executable code to speed up work. This allows you to bypass restrictions Google Play on the size of the APK, but requires additional efforts from developers to encrypt and verify the integrity of files.

Is it possible to delete files from the Android/obb folder

Short answer: yes, but with caution. The long answer requires understanding several nuances:

1. Current application files. If you delete .obb-file of an active game (for example, Free Fire), the next time you start it either:

- Automatically download the data again (if there is Internet).

- It will generate an error and close (if the files are critical for operation).

2. Files of deleted applications. If the application has been uninstalled for a long time, its .obbfiles can be safely deleted. They take up space in vain. For example, after deletion Need for Speed: No Limits files of the form main.1.com.ea.game.nfs14_row.obb with a total weight of ~1.5 GB may remain in the folder.

3. Outdated versions. When updating the game, sometimes old .obbfiles remain (for example, main.1... i main.2...). You can delete an unnecessary version, but only if you are sure that the new one works correctly.

Make sure that the application is not in use|Check the modification date of the file (old ones can be deleted)|Keep a backup copy of important files|After deleting, restart the application to check-->

⚠️ Attention: Some applications (for example, Pokémon GO) store not only resources, but also data in obb account or progress. Deleting such files may result in loss of game achievements. Always check if progress is synchronized with the cloud (for example, through Google Play Games or Facebook).

If you are not sure which file can be deleted, use a file manager with an analysis function (for example, Files by Google or Solid Explorer). They show which application uses this or that .obbfile.

How to transfer the Android/obb folder to a memory card

By default, the folder Android/obb is created in the internal memory of the device. (for example, 16–32 GB) this becomes a problem. Fortunately, it can be transferred to microSD, but there are important limitations:

1. Memory card support. The device must support adoptable storage (built-in storage) or at least read/write to SD. (especially on Medatek) errors may occur when working with obb on the card.

2. Access rights. The folder Android/obb on the memory card must have the same rights as the original. contact.

Transfer instructions:

1. Copy the folder Android/obb to a memory card (do not move, just copy!).
2. Make sure that the path looks like like this: /storage/XXXX-XXXX/Android/obb (where XXXX-XXXX is the identifier of your SDcard).
3. Run an application that uses .obbfiles. If it works without errors, the original folder in the internal memory can be deleted.

⚠️ Attention: On devices with Android 11+ problems may arise due to limitations Scoped Storage. Some applications (especially games) refuse to work with obb on the memory card, requiring internal storage. In this case, only root access or the use of Magiskmodules to bypass restrictions will help.

What to do if the game does not see obb on the memory card?

1. Check that the card is formatted as internal memory (in the storage settings).

2. Try moving only the necessary files (not the entire folder obb).

3. Use FolderMount or similar utilities to create symbolic links.

4. If all else fails, return the files to internal memory.

How to recover deleted files from a folder obb

If you accidentally deleted files from Android/obb, there are several ways to restore them:

1. Reinstalling the application. Most games automatically download .obbfiles when you first start them. For example, Clash of Clans downloads missing resources from. servers Supercell. However, this only works if the Internet is available and can take a lot of time (for example, Genshin Impact downloads ~15 GB).

2. Manual downloadSome developers place .obbfiles on their own. sites. For example, for Minecraft they can be downloaded from minecraft.net. Search for files using the pattern: package_name.obb.

3. Restoring from a backup. Titanium Backup or similar tools, check for a backup folder obb. The restoration will take a few minutes, but will return all data to its original state.

4. Specialized utilities. apps like DiskDigger or Recuva (for Windows) can scan the device’s memory for deleted files. However, the chances of recovery depend on how much data was written over the deleted files.

⚠️ Attention: Never download .obbfiles from dubious sites! They may contain viruses or be outdated. Always check the checksums (MD5 or SHA-1) of files if they are provided by the developer.

Frequent problems with the Android/obb folder and their solutions

The folder obb can become a source of various errors. Let's look at typical scenarios and ways to resolve them:

Problem 1: The game does not start, it says "Files are corrupted"

• 🔹 Delete the current .obbfiles and let the game download them again.
• 🔹 Check the integrity of the files (if downloaded manually). For example, for GTA: San Andreas size main.1.com.rockstargames.gtasa.obb should be exactly 1.48 GB.
• 🔹 Disable your antivirus - some apps (for example, Avast) block access to obb.

Problem 2: The obb folder disappeared after updating Android

This is a common situation when upgrading to new versions Android (for example, from 10 to 11). The system may move the folder to another location or change the access rights. Solution:

1. Check for the presence of a folder along the path /storage/emulated/0/Android/obb.
2. If there is no folder, create it manually and copy there .obbfiles from the backup.
3. Reboot the device.

Problem 3: Not enough space for downloading obb files

Large games (for example, Call of Duty Mobile) require up to 6–8 GB of free space for unpacking .obb. If memory is low:

• 📱 Free up space by deleting unnecessary files or transferring them to SDcard.
• 🔄 Use the "Clear cache" function in the application settings.
• 🖥️ Connect your smartphone to PC and download .obb directly to your computer, and then transfer to the device.

⚠️ Attention: On some devices (for example, Xiaomi s MIUI), the system aggressively clears the cache, including the folder obb. To avoid this, add the folder to optimization exceptions in the battery settings.

How to optimize the use of the Android/obb folder

The folder obb can grow to tens of gigabytes, especially if you install a lot of games. Here are a few ways to keep it under control:

1. Regular cleaning

• 🧹Delete .obbfiles of games that you have not played for a long time. For example, Asphalt 8 occupies ~1.5 GB.
• 🔍 Use SD Maid or CCleaner to search for "orphan" files (belonging to remote applications).

2. Download control

• 📥 In the settings Google Play disable auto-update of large games via the mobile data.
• 🎮 For games like PUBG Mobile or Fortnite download .obb only via Wi-Fi.

3. Alternative sources

Some games (for example, Minecraft or Stardew Valley) allow you to install resources from third-party sources. This can save space if the official .obbfiles are too large. However, be careful:

• ⚠️ Check files for viruses (for example, through VirusTotal).
• ⚖️ Make sure that the source is legal - pirated ones .obb may contain malicious code.

4. Compression and archiving

If you are temporarily not playing a game, but want to save your progress, you can:

1. Copy .obbfiles to your PC.
2. Archive them in .zip with maximum compression (for example, via 7-Zip).
3. If necessary, unpack back to Android/obb.

Critical information: Some games (for example, Lineage 2 Revolution) store not only resources, but also account data. Archiving such files can lead to account blocking for suspicious activity. obb not only resources, but also account data. Archiving such files may lead to account blocking for suspicious activity.

FAQ: Answers to frequently asked questions

Is it possible to rename files in the obb folder?

No, this will lead to errors when launching the application. File names are strictly tied to the package identifier (com.company.game) and. version. If you need to transfer the file to another device, copy it without changes.

Why, after updating the game, the obb folder began to weigh more?

Developers often add new content (levels, characters, textures) in the form of patch.X...Old main.X... files. stay, taking up space. Check which files are current and delete outdated ones.

Is it possible to open an obb file on a PC?

Yes, but not always. Files .obb are archives, but they can be encrypted. Try: data-i="295">Rename extension to

1. Rename extension to .zip and open with an archiver.
2. Use utilities like OBB Extractor (for Android).

Please note that unpacked data is often useless without the game - it can be in an encrypted or proprietary format.

What to do if the obb folder is not created automatically?

Create it manually along the path /storage/emulated/0/Android/obb. Make sure that the folder has the correct access rights (for example, drwx--x--xIf the problem persists, check if an antivirus or data protection function is blocking access (for example, Knox on Samsung).

Is it possible to store obb files in the cloud (Google Drive, Yandex.Disk)?

Technically yes, but this is inconvenient:

• 🔹 Each time you start the game, the files will have to be downloaded again.
• 🔹 Some applications require local access obb and do not work with cloud folders.
• 🔹 Cloud services can compress or modify files, which will lead to errors.

It is better to use the cloud for backup rather than permanent storage.