With the open source app TrebleShot you can send and receive all kinds of files without an internet connection. All you need is to set up a hotspot and use a QR code to share content with anyone you want.
TrebleShot can share a wide variety of file types: images, text, videos, apps, and even entire folders. Not only that, but you can pause a file transfer and resume it later, a great feature that's especially useful for large files (like videos or games).
TrebleShot has a clean, minimalist interface which makes it very easy to use, and will automatically detect devices connected to the same WiFi network. That being said, you can also manually scan for devices and view all available devices in just a few seconds.
Overall, TrebleShot is a great file-sharing app, with a user-friendly interface and a wide variety of features. Share music, videos, photos, or anything else with any of your friends in a matter of seconds.