FreeFileSync Forum

Thanks for the reply.
Yes, as I said, I've done that by adding a designated phrase to the filenames, such as "not4Car" & putting that in the FFS filter designation, but it is time consuming and cumbersome.
The solution doesn't have to be achieved by FFS - happy to use any other free utility to do ...

I have an expanding music database as I rip my CDs to FLAC & mp3 files to my NAS, as
Artist/Album/FLAC/xx.flac & Artist/Album/xx.mp3, with the Artist folders set in a particular structure.
This enables me to play either type via Sonos, but I’d also like to play mp3s in the car, which has a limited ...