By metadata, I’m talking about things like text descriptions of a photo/video and where they come from, or an explanation of what a certain binary blob contains, its format, how to use it, etc.

The best solution I have right now is xattrs, but those are dependent on the file system, and there’s no guarantee that they will stay when the files get moved, especially if the person moving them is unaware of its existence. The alternative is to keep a plaintext file with this metadata alongside every photo/video/binary/etc, but that would be a huge pain to keep in sync since both files have to be moved together.

So my question to you: do you keep this kind of metadata? If so, how do you manage them?