What is the Android folder structure?

Last reviewed: October 1, 2026 · Markdown version

Open Internal storage in a file manager and the first level is mostly a set of folders Android itself names. Each one is a constant in Android's Environment class, with a line saying what belongs there. Knowing that list tells you which folders are the system's convention, which belong to apps, and which ones an app made up on its own.

The named folders

From Android's reference, in its own words where the wording helps (Environment — Android Developers, read 1 October 2026):

DCIM — the camera's folder, described there as the traditional home of pictures and videos from a device acting as a camera.
Pictures — "pictures that are available to the user". Screenshots (added in Android 10) is "Typically used as a secondary directory under" Pictures.
Movies — "movies that are available to the user".
Music, with six audio siblings: Alarms, Notifications, Ringtones, Podcasts, Audiobooks (Android 10) and Recordings (Android 12, API level 31). Each is for sounds that should appear in that particular list, "not as regular music".
Documents — "documents that have been created by the user".
Download — "files that have been downloaded by the user". The reference explains the odd spelling: the constant is plural, but "the actual file name is non-plural for backwards compatibility reasons".

Android's media guide then says which of these the system indexes for gallery and music apps: images from DCIM/ and Pictures/, video from those two plus Movies/, audio from the sound folders above, and downloads from Download/ (Access media files from shared storage, read 1 October 2026). Documents/ is not in that list.

A convention, not a fence

The same reference is candid that some names are only a habit. For Pictures and Movies it says the folder "is primarily a convention for the top-level public directory, as the media scanner will find and collect" pictures or movies "in any directory". The media guide shows apps choosing their own spot: an app can ask for a path such as Pictures/MyVacationPictures, and without a hint "new image files are placed in" Pictures by default (media guide above). That is why a messaging app, a scanner app or an editor can each leave a folder of its own beside the standard ones — they are allowed to.

Android/data and Android/obb

These two belong to installed apps, not to you. Android's guide on app-specific files says "When the user uninstalls your app, the files saved in app-specific storage are removed" (Access app-specific files, read 1 October 2026). Since Android 11, an app that targets it cannot ask you to pick files from "The Android/data/ directory and all subdirectories" or the matching Android/obb/ tree through the system picker (Storage updates in Android 11, read 1 October 2026), which is why those folders look empty or locked in many file managers. The wider rules are explained here, and the part of an app's storage you can never browse is covered on our internal-storage page.

Reading your own phone's tree

Our rule of thumb for an unfamiliar top-level folder: if its name is on the list above, it is Android's; if it is named after an app, that app made it, and deleting it may break or reset that app. Files you want to keep are safest in the named shared folders, because Android's media guide notes that files in the media store remain "Even after your app is uninstalled" — unlike the app-specific ones above.

Where Adinand Auto File Sorter writes in this tree

One place only: a folder named Sorted Files inside Download, with a sub-folder per category. By default it reads only the files sitting directly in Download; on Pro you can add WhatsApp Documents, Telegram, Bluetooth, Screenshots or a folder you pick, and what it finds there is still moved into that one Sorted Files tree rather than left near its source. The camera's own folder is never offered as a preset.