Hi-end Audiophile grade USB switches

You're going to need some way of getting the FLAC files off the  USB hard drive/flash drive whatever you have them on unless you have them on your computer and connect your computer to the DAC. 

Get yourself a USB to SP/DIF converter or a USB Dac then take the dac analog out to an input on your preamp

Hello MoonCrikit, I do not have a solution for your question, but a question myself. May I ask for your expertise and guidance? ow can I connect my music collection on a FLAC USB to my pre-amp listed here? My sound system is an early 80s ‘stack’ system.

None of the components are digital: Bryston 2B solid state amp, Conrad-Johnson PV-11 pre-amp, MIT 330 interconnects, MusicWave phase-equalized speaker cables, California Audio Labs CD Alpha and Delta drive, Dual 1129 turntable. B&W 803 speakers.

I would appreciate your suggestions and guidance on the matter.Thank you.

Mark Saracino

Sorry! Maybe that channel delves into your question, though. He's a smart guy with sober judgment.

Thanx for your links but those all address ethernet switches, none address USB switching...

Possibly of interest:
https://www.youtube.com/watch?v=Io4SDi5hLxs&ab_channel=TheHansBeekhuyzenChannel
https://www.youtube.com/watch?v=BbRF8z8dQFU&ab_channel=TheHansBeekhuyzenChannel
https://www.youtube.com/watch?v=tPWS3Lk6y1g&ab_channel=TheHansBeekhuyzenChannel