Your game reinstalls its data every launch: fix the OBB folder
Large Android games split themselves in two: a small APK holding the code, and an OBB expansion file holding textures, audio and levels. The game finds the OBB by looking at one fixed path. If the folder is one level too deep, named slightly wrong, or sitting on the wrong storage volume, the game concludes the data is missing and starts a fresh download.
The path has to be exact
Android expects expansion data at Android/obb/<package name>/ on the primary shared storage. The package name is the identifier in the app's URL, not the game's display name.
| Wrong | Why it fails |
|---|---|
Android/obb/MyGame/ | Uses the display name rather than the package name |
Android/obb/com.example.game/data/ | One folder too deep |
Download/Android/obb/... | Not the root of shared storage |
SD card Android/obb/... | Some games only look at internal storage |
com.Example.Game | Case matters on most devices |
Quảng cáo
Repairing it by hand
- Get a file manager with all-files access Android 11 and newer block ordinary apps from writing into Android/obb, so the manager needs the special permission granted in settings.
- Install the game and open it once Let it start the download, then close it. Android creates the correct folder for you, which removes any doubt about the name.
- Move your .obb file in Put the file directly inside that folder. Do not create a subfolder and do not rename the file.
- Reopen the game It should skip the download entirely. If it does not, the OBB belongs to a different version of the game.
That last point catches people out. An OBB is tied to the version code it shipped with, and the filename contains it, for example main.4210.com.example.game.obb. A newer APK will ignore an older OBB.
Avoiding the problem next time
An XAPK bundle contains the APK and the OBB together and puts both in the right place, which is why large games are distributed that way. Using a bundle installer removes the manual step altogether.
If you prefer to keep files yourself, back up the whole Android/obb folder before a factory reset. It is usually the largest thing on the phone that is genuinely worth keeping.
The path is Android/obb/<package name>/, the version code has to match, and a bundle installer does the whole thing for you.
Frequently asked questions
Can OBB files live on an SD card?
On many devices yes, if the card is formatted as portable storage and the game accepts it. Plenty of games only check internal storage, so if the card path does not work, that is the reason.
Why did the folder disappear after I uninstalled the game?
Android deletes the app's obb and data folders on uninstall. Copy the OBB somewhere else first if you plan to reinstall without re-downloading.
Is it safe to download an OBB separately?
Only from the same source as the APK, and only for the matching version. A mismatched OBB will not work, and an OBB from an unknown source is a large opaque file you cannot inspect.
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