Sorry guys !
Took me a while to realise the ‘share’ options should let you switch DLNA on/off for *each* ‘share’ directory.
Rather than take liberties with the filing system, I’m moving my ~15 GB, ~227 000 ‘Nik_Files’ tree to a new ‘share’ directory. About 11 GB, 4~~6 hrs left due many, many small files.
( Tiny files crawl by at 100 KB/s, middling files go 500 KB/s, big images and chunky PDFs scoot at 2.5 MB/s… )
So, I’ll then disable DLNA for my research & writing archive, enable the ‘Public’ area with those albums, re-enable the myCloud, set the whatsit to re-scan the media files .
Should do it.
Perhaps.
Maybe…
D’uh…