Yes, thanks. I’d found …/remote.php/webdav rather by luck on the bottom left side within Settings, but at first it didn’t work.
I’ve now made some changes to my Nginx config and it’s started to work now…
I see that …/remote.php/webdav is truly for file access, whereas…/remote.php/dav is for access to AddressBook and Calendar etc. The Username does not appear to be necessary.
The NextCloud Sync app didn’t have a problem, and mydomain.com/nextcloud was sufficient. It was the client app, Syncovery that did - but it’s fixed now.
Thanks
EDIT
I’ve found that
…/remote.php/dav/files/USERNAME/
does give access to files, and that is what the Manual for v12 says, but the App itself shows
…/remote.php/webdav
I don’t suppose it matters.
But, disappointingly, NextCloud’s WebDav is much slower than Pydio v8 is on same hardware.