Where applications are stored on Android: complete analysis of paths

Smartphone users often wonder where exactly the operating system places the files after installing new software. This is not just idle curiosity, but a necessity for those who want to clean their device of debris or transfer data. Unlike desktop Windows, where each app has its own folder in app Files, the architecture Android is designed differently, which often confuses beginners.

The system distributes application files into several hidden directories, access to which is limited by superuser rights. Understanding this structure is critical for proper memory management and error diagnosis. In this article we will analyze in detail the logic of file distribution and ways of interacting with them.

It is worth noting right away that using standard methods through the file manager you will only see the tip of the iceberg. Full access to system partitions requires special knowledge or root access. Let's take a look at how the storage inside your gadget is organized.

Logical structure of data storage

The Android operating system is based on the Linux kernel, which dictates its own rules for organizing the file system. All applications that you download from Google Play or install manually are located in a special partition, often called “internal memory” or the system partition. This space is not an ordinary flash drive, to which you can simply connect via USB and copy files.

The main directory, where the executable files of the apps are physically located, is located along the path /data/app/. This is where the APK files of installed applications are stored. However, it is impossible to see this folder without rights Root (superuser). A standard file manager will only show you emptiness or give you an access error, since this is a system security measure.

In addition to the executable code, each application creates its own folders for storing caches, databases and user settings. This data is located in the directory /data/data/. Everything that makes the application “live” is stored here: your correspondence in instant messengers, progress in games, authorization tokens and temporary files. Deleting the contents of this folder is tantamount to completely resetting the application to factory settings.

With the development of Android versions, especially starting from version 11, Google has tightened its file access policy. Now, even with root access, access to some system zones may be limited by the Scoped Storagemechanism. This is done to prevent malware from reading data from other applications without the user's knowledge.

⚠️ Warning: Directly editing files in folders /data/app or /data/data can lead to system inoperability or data loss. Any manipulation in these sections requires a complete copy of the important information.

Main installation path and system partitions

When you click the “Install” button, the Android package manager (PackageManager) performs a complex sequence of actions. It copies the APK file to a protected area of ​​the internal memory. Modern versions of Android use a file system ext4 or f2fs, which ensures data integrity even in the event of a sudden power outage.

System applications pre-installed by the smartphone manufacturer are located in an even more secure section - /system/app/ or /system/priv-app/. These apps cannot be removed in the usual way, since the partition /system mounted read-only by default. To work with them, you need to unlock the bootloader and flash the firmware.

Interestingly, the application files themselves can be optimized for a specific device. After installation, the system compiles the bytecode into native machine code (AOT compilation process), creating files .oat or .vdex. They also take up space in the system partition, but significantly speed up the launch of apps.

The size of the partition where apps are installed is limited by the amount of built-in memory of the device. If you see the message “Not enough memory”, it means that the free space in the partition /data has run out, even if there are still a full gigabyte on the memory card. Moving applications to an SD card works differently and depends on the support of this function by the software developer.

Android folder and user data

Unlike hidden system directories, the folder /Android/ is located in user space and can be viewed without root access. This is where apps store their external data: downloaded maps, music, large cache files, and documents. The path to it usually looks like /storage/emulated/0/Android/.

Inside this folder there are two key subdirectories: data and obb. The folder obb (Opaque Binary Blob) stores additional resources for heavy games and apps that are not included in the main APK file. This allows you to reduce the size of the installer, but requires the Internet or pre-loading data when you first start.

The folder data inside the user section /Android/ contains SQLite databases, settings and avatars. Access to it in Android 11 and higher is very limited: you can only see the folders of the applications you use, but you cannot view the files of other apps. This is part of the privacy policy.

• 📂 obb — heavy game resources (textures, levels, media).
• 📂 data — databases, image caches, application logs.
• 📂 media — multimedia files created by applications (for example, WhatsApp voice messages).

Cleaning folder Android/obb may cause games to stop launching and require resources to be downloaded again. Be careful when manually cleaning this partition, delete only what you are 100% sure of.

Transferring applications to a memory card

Many users strive to free up precious space in internal memory by transferring applications to a microSD card. However, this feature, known as Adoptable Storage, does not work on all devices. The smartphone manufacturer can programmatically block the ability to install apps on external media.

If the function is supported, when formatting the memory card, the system will offer to use it as part of the internal storage. In this case, the card is encrypted and linked to a specific phone. It will no longer be possible to read it on another device or computer without formatting.

There is also a classic transfer method available in the settings of some shells. It allows you to move only part of the application data, while the executable file remains on the system. This saves space, but is not as effective as a full transfer.

The speed of applications installed on a memory card directly depends on the speed class of the card itself. Cheap microSD cards can become a bottleneck, causing lags and long loading times. To install apps, it is recommended to use standard cards UHS-I or UHS-II with a high IOPS.

Memory analysis using ADB

For advanced users who want to get accurate information about how much space each application takes up and where it is located, the best tool is Android Debug Bridge (ADB). This is a console utility that allows you to control the device from a computer.

By connecting your smartphone to the PC and enabling USB debugging, you can get a complete list of installed packages and their paths. The command adb shell pm list packages will display all packages, and more detailed information about a specific application can be obtained by adding the flag -f.

adb shell pm list packages -f | grep telegram

This command will show the full path to the APK file of the Telegram application. If the path starts with /data/app/, then the application is installed in the internal memory. If the path points to /mnt/asec/ or contains sdcard, then some of the data is located on external media.

You can also force applications to be moved through ADB, if the system allows it. The command adb shell pm set-install-location accepts parameters: 0 (auto), 1 (internal memory), 2 (external storage). However, not all applications work correctly during forced transfer.

⚠️ Attention: The ADB interface may vary depending on the Android version. Some commands may not work on devices with heavily modified firmware from Xiaomi, Samsung or Huawei.

The influence of the Android version on access paths

With each update of the operating system, Google changes the rules for accessing the file system. If in Android 6.0 access to the folder /Android/ was completely open, then in Android 13 and 14 access to it is closed even for file managers who do not have special system permissions.

This is due to the implementation of the mechanism Scoped Storage (Limited storage). Now applications are isolated from each other and cannot simply scan the entire disk for files. This increases security, but complicates life for users accustomed to the freedom of the file system.

To bypass these restrictions, developers of file managers (for example, Total Commander or Solid Explorer) use special document access APIs. When you first launch, they will ask you to give permission to access the Android folder by redirecting to the system menu.

On devices with root access, these restrictions do not apply, since the superuser has access to all disk partitions. However, gaining root access (via Magisk or KernelSU) can disrupt banking applications and highly secure services.