I mentioned the USB cable as how I do it now. Many years ago with M$ I had a Nokia phone, Nokia cable and Nokia Software. It was this Nokia software the synced outlook contacts, etc, with the Mobile Nokia built in “apps”.
I am not bothered if it sync’s over WiFi. As long as it’s when I choose, and over my secure network or cables.
Since OpojOJirYAlG made a request, I’ll add one.
M$ Outlook and the other Outlook business version, had a “BACKUP” version the compressed (in my case) annually all my emails, appointments, etc into a single file. I could then delete that years emails (including all the funnies and cartoons) and if I needed to re-read something, I could just load that years backup and read through.
Thunderbird DOESN’T do this at all. PureOS Calendar I haven’t checked yet. I wanted to know if syncing was possible before I purchased.
StevenR mentioned Making one a master, and the others slaves to it. It’ sort of could work. But if I add a contact on my phone whilst out-and-about, then sync, I’ll lose that contact
As it doesn’t appear without programming skills, (I’ll add it to my to-do list), Honestly and thanks to all whom have replied, I am not all that interested in changing. I’ll continue to run PureOS as a VM (since it error’s out trying to Dual, I mean quad boot on my laptop with other things, including M$. (Hey. It came with the laptop, thought it might be kinda fun to screw around with… Again)
Thanks to you all