File Education
Common Android file formats explained
Knowing file extensions helps you avoid opening the wrong file, deleting important backups, or trying to play media in an app that does not support it.
Quick reference
| Format | Used for | Recommended action |
|---|---|---|
| APK | Android app installer. | Verify source before installing. |
| ZIP | Compressed files or backups. | Extract only trusted archives. |
| MP4 / MKV | Video files. | Open in a media player. |
| MP3 / M4A | Audio files. | Open in a music or playlist player. |
| PDF / TXT | Documents and notes. | Keep in a Documents folder. |
Organization tip
Sort files by type before cleanup. APKs belong in an installer folder, videos in Movies, music in Music, and documents in Documents. This makes TV remote navigation much easier.