Two notebooks are editing a document at the same time?

I have two notebooks with Windows 10. Is there a possibility other than Google Drive, preferably a way that NO network is possible to quasi an Excel spreadsheet that is automatically updated on both devices? Almost an adapter, etc.

Do you mean without an Internet service, or without a local network?

Any data connection must already exist.

Maybe you can accomplish that via a mini NAS.

By that I mean e.g. A USB stick, or USB-HD on the router, which serves as a local media server.

Since you can then access via Lan, or wireless directly.

But I can't really say how this can be done with simultaneous editing. I have never tried such things.

And on real NAS systems, you can set up your own data cloud for sharing. This works like Google Drive, but only completely in the local network.

Without network? Do you mean without internet?

So if you two are on the same network then that should not be that hard.

I can't imagine that without a network.

If you want to use Excel, Word etc.

https://sharegate.com/blog/how-to-start-a-collaboration-intranet-in-office-365

Yes, exactly, without internet. The problem is that the notebooks are always on the move and then, where they are used, no Internet connection exists.

WITHOUT network

Depends on your definition of the term network.

But regardless of this, there's another problem: Afaik are Excel workbooks (or at least Excel itself) without being able to work on two or more points simultaneously without another intermediate level, without causing problems (see also: https://de.wikipedia.org/...situation).

So if the processes are not somehow synchronized or otherwise regulated, it is actually only a matter of time until the document is "damaged" in whole or in part.

Either a direct WLan connection between (exclusively) these two devices is recommended.

Theoretically, you could even switch your own WLan repeater in between, if it connects exclusively to these two devices.

Or you can use a simple "crossover" network cable. And depending on the existing LAN interface, even a normal LAN cable could work if the LAN ports independently recognize this crossover connection.

The rest is then a matter of the software used.