Hidizs AP 80 Pro - Alternative to Laptop with long USB cable and Schiit DAC?

@kraftwerkturbo -- "alternative (storing and playing my files, converting to analog, feeding my receiver) to my current setup"

How about the following option -- share the music folders on your laptop so they are accessible to your local network. (Or alternatively, buy an inexpensive NAS and store your files on that.)  Then, purchase one of the inexpensive Wiim players which can be located right by your Onkyo. The Wiim has a built-in DAC (OK quality, but your Modi is better) or it can feed your Modi via an optical or coax cable.

Such a setup would give you access to your local files as well to a number of quality streaming services such as Tidal, Qobuz, etc. Wiim are also one of the easiest players to set up. All of this is controlled by an app on your iPhone or Android phone.

I believe USB specs state that the cable should not be longer than about 16'.  You increase the risk of data errors and noise pickup with runs longer than that. The Wiim simply allows you to have the streamer sitting next to the DAC, with a very short cable. And, unlike a laptop which is designed to do all things computerish, most of which have nothing to do with audio playback, the Wiim and its OS are designed to do only one thing - audio.

You can always buy a Wiim on Amazon and return it for a full refund if you find it doesn't improve your listening experience.