Aries Mini doesn't see DSD Files

I’m streaming music to my Aries Mini from an ssd plugged in to the USB port of my ASUS router. All is fine with 16/44 to 24/192 etc, but the Lightning DS app doesn’t see the DSD files. I happen to have some of these files on the Mini’s internal ssd and it sees and play these fine. I’m baffled because the files look exactly the same, same folders, same extensions - any ideas?

Did you check the tags in your DSF files ?

The files were ripped with JRiver and all the tags look the same

Browsing by folder in Lightning DS the DSD Album folders are there but there’s nothing showing in them - when viewing via Windows or JRiver the dsf files are physically there (and play)