Where is my iCloud data stored?
iCloud is a great feature for keeping my Calendar and Contacts synchronised, and sharing new photos. But exactly where is all this data stored?
I don't use iCloud Drive, and there are times when I am offline when having access to Contacts and Calendar would be useful. So I know that this data is stored in iCloud on Apple's servers, but is it also stored on all my devices such that I can access it when offline? I recently had occasion to turn off iCloud Contacts sync (in connection with a problem, now resolved), and all my contacts disappeared: so it appears that it isn't stored locally, as I would wish.
I don't want to archive Contacts or Calendar, as the archive wouldn't sync. I just want my regular data to sync normally and be available when off-line. So where is the data stored?
I have a similar question about myPhotoStream. New photos on one device appear on all the others via myPhotoStream, but are these photos actually automatically imported into my Photos library on the secondary devices, or do I have to do something? And how much time do I have to do that something? I sometimes travel for weeks with just my iPad, but want the new photos to get to my main library in my iMac when I get home. Again, exactly what is stored where, and when?
All the documentation I have seen really doesn't answer these questions: it just says that stuff magically appears everywhere and stays in sync. I'm probably a bit old-fashioned in that I really want to know where all my data is all the time, so that I can keep track of it.
Thanks for any clarification on this.
Paul.
iMac, macOS High Sierra (10.13.5), i7 2.8Ghz, 12 GB RAM