I had a message from Microsoft about Groups and I don't even have any or in any.
I have asked Microsoft why I got the message and as normal Microsoft isn't saying anything.
With regards to an alternative to Groups, I would have a look at alternative suppliers of cloud space. I just moved up from Windows 8.1.1 to Windows 10 and the OneDrive implementation in Windows 10 is really retrograde and in my case useless. You now have to sync the folders to the device that you want to see the OneDrive files on - in my case that would be 400 Gb with one folder 240 Gb in size. As I said before Windows 10 OneDrive is useless to me.
Regards
Infinidim