Save data from several devices on the network drive and mirror them on the respective devices?

Save data from several devices on the network drive and mirror them on the respective devices?

So I can transfer all data from a laptop, mobile phone, PC via a network drive to a NAS / own cloud and then mirror the data on the devices. The idea of all data from all devices is stored on a NAS / cloud so that you can use each device involved could access the other's storage via the Internet. So that you don't always need Wi-Fi / internet, software synchronizes the data on all device hard drives when you have internet access.

Now my question,:

Is that possible

there are clever freeware

do you have any recommendations?

That's fine. I have had good experiences with Nextcloud. Can you set up your own server, even with Docker. Everything is open source and expandable. 👍

But I don't quite understand about the mirroring. What exactly do you want there? So that the server creates a backup copy on another drive?

When it comes to peer-to-peer synchronization, I can recommend Syncthing. There's no need for a server and that can also be done on mobile phones, tablets and over the Internet, even without a domain. 😉