I recently installed Nextcloud on my homeserver and connected my Windows PC with it to share files. The main reason is to have a backup of my current working files.
Configuration server: Windows 10 Pro with VMWare running Nextcloud 15 (T&M Hansson VM), gigabit ethernet, 1 TB SSD, intel Core i5, 16 GB Ram
Configuration client: Windows 10 Pro, Nextcloud client 2.5.1final build 20181204, gigabit ethernet, SSD, intel Core i7, 16 GB Ram
I created 3 shares:
 Email directory E:\Emails, 2,000 files, 350 folders, 4 GB data
 Document directory E:\privatedata, 25,000 files, 2,600 folders, 12 GB data
 Source code directory D:, 210,000 files, 50,000 folders, 23 GB data
 and  did synchronise well, the jobs finished within reasonable time.  crashed after 60,000 files, hung up in second run after 2 hours and in third run finished after 15 hours. In first run of  the client displayed the number of files it already synchronised and the number of total files, in run 2 and 3 the only progress indicator was the name of the currently handled directory.
Here’s my questions:
Is it to optimistic to use Nextcloud with such a number of files and folders? From time to time I see the client scanning the entire directory tree, which takes 3 or 4 minutes. With the same setup in Dropbox files are synchronised immediately after every change
There is no log file for my synchronisation . Is it because it is the root of a drive? The other 2 configurations have log files
Can I optimize my setup somehow? E.g. I don’t need access to deleted or changed files on the server and don’t need to scan for file changes on the server as well, since I use it only as a backup
Thanks for any answer… Reiner