How are media files stored on devices?

To keep bandwidth and storage usage low but provide a fast experience, Anytype downloads Text and Images to your device automatically as they are smaller in size.
Files and Videos are downloaded on-demand. For example, on mobile devices, it's only when you choose to play the video that it will begin to download and save on your device. It also works as a cache. For example, when watching 10% of movies, Anytype may preload and store 30%. So if you are streaming or frequently using a large file, it will be taken from your device storage.
Files are fully downloaded when you press download and get "cached" on your device.
Working with cache is not yet available and will be implemented in the next release.