why would my OneDrive suddenly be processing over 40,000 changes?

Was not using Nord VPN or any VPN on the computers we had OneDrive explode on. Also happened on both Windows 10 and 11 and Mac (including different versions of macOS). I think this problem is more widespread than VPNs.

You brought an interesting topic... I also use VPN. Proton VPN.

It might be worth changing the setting in Windows to identify your mobile phone as a "metered connection"; this generally causes OneDrive to pause any activity. Funny you should mention Nord, I also use that. Seems weird that might have this impact. Since posting, I've gone back up to 170k files!

Same issue... I now understand why my mobile phone internet data vanished some time ago after using it as wifi access point for my laptop: This undesired synching has sucked dozens of Gb and is repeated without any control.

What I still don't understand is why I see this... I just have the feeling that in my case it happened after using NordVPN which somehow makes my W11 OS PC very uncomfortable when activated (every action taken on PC goes very very slow and shutting down completely NordVPN services kind of solves the problem).

Could it be related to NordVPN or VPN in general?

Same issue here, processing over 275k changes for no reason at 12 per second.

Two things:

1. Microsoft products are really disgusting
2. Support is non existent