after log work (thanks a lot to the few people who contributed answers to my several posts!) I have been able to get my Nextcloud up and running.
Now, I noticed something I´m not quite sure about it yet: I have to clients (desktop, laptop) which do seem to differ a little bit in file size and file count. Also, i noted that allthough the cloud is fully synced and no file changed, sometimes there will be again sync activity when restarting one of my computers.
I have both computers on the same account, so the laptop and the desktop are syncing with the same user name. could this be a problem? should i better have seperate users for laptop and desktop? (note: different persons will of course get different accounts, but its typicall that a user has seperate machines to work on, which may run at the same time or may run at different times)