Several files saving as one

I write a novels. In this job, of course, I need one main writer file where the story is described. This is File1. But I use the second writer file to keep things, I mean fragments to use in the future or index of characters or something else. This is File2. There is the third file in calc or calendar with chronology of the novel. I need it to keep the time order in the novel. This id File3.
Now I have File1, File2 and File3 and have to save them seperately a few times a day. Terrible.
Life would be better if this 3 files could be in one, but every of them in its own window. I mean three files joined in one for saving and opening.

Greetings,
Miroslaw.

Does your OS provide facilities to group-open several files? Have you stored your novel “components” in the same directory?

I think the answer to your question is in structuring your workflow. Pressing Ctl+S separately on 3 windows is not a big deal. You can also enable auto-save and auto-backup.

not so.

Saving Documents Automatically

and more generally : Preventing data disaster - The Document Foundation Wiki