thank you very much for your response.
NCP running on a Pi4 without docker … did a ncp-report but that contains too many sensitive data.
What happened is extremely strange, I must start from beginning … there are 3 PCs syncing to NCP
PC1 last used July 13th (deprecated)
PC2 last used July 21st 12:00h (most current)
PC3 last used July 21st 15:00h (most current)
I noticed today on PC3 that sync directory was empty, used web login, all files gone but calendar, bookmarks etc. still there - notifications showed that NCP updated this morning
I checked PC2, sync directory was empty, too
I disconnected PC1 from network before starting it, sync directory was there status July13th (deprecated) - I made a (deprecated) backup of PC1
I SSH’d into NCP and found all files status July 21st (most current) were in /var/www/ncp-data.DBmfcR//files … I squeezed them into a tar file and saved it …
I then connected PC1 to the network and - strange enough - it did not purge the sync directory like PC2 and PC3, but it synced back (deprecated) version July 13th to NCP - so now I have on NCP and PC1 the deprecated version and in my tar file the most current version.
Deprecated but fully synced data on NCP are now on /var/www/nextcloud/data//files
I’ll be able to merge them with my backup, so actually my problem is solved, although the experience was pretty awkward and I learned, I have to put more effort in backing up NCP daily to be protected against such surprises purging data on all connected PCs …
Question: is /var/www/ncp-data.DBmfcR//files the backup, which was created during upgrade ?
Thanks for reading …