Adam Råstrand Sorry didn't realize you are blind, I think you might be having difficulties because some information on the site is displayed inside the tooltips on mouse hover over, it probably is not recognized by screen readers.
For example, under the "compatibility" and "adaptations" section it lists what keyboards support each style. If you have DGX670 then very few styles will be fully supported, certainly none of the Genos styles. SX600 should support more styles. You can understand the level of compatibility by checking the compatibility labels for each keyboard that are usually present somewhere next to a style name.
Let me try to explain what's going on on this site. When a style is uploaded we try to autodetect which keyboards would support it (meaning have all the voices and features). We display this information under the "compatibility" section. We also try to group the same styles across different keyboards under "adaptations". So we are not converting or revoicing styles, only grouping uploaded styles together if we find any matches.
So if you want to find a style that will work on DGX670 you can start by going to the "styles" section of the site, choose DGX670 keyboard under filters, and it will show you all styles that are fully or partially compatible. To figure out the level of compatibility you need to check the "compatibility" labels (which I am not sure if your screen reader is recognizing).
I think you just want to download tons of styles and just go through them on your own and not to fiddle with USB cables. At this stage this site is not really offering mass downloads. Our goal is to allow finding very specific individual styles (covering specific songs for example). There are other sites I'm sure you already know about, like psrtutorial, that offer just what you need - zip archives of styles. Perhaps you will find them more useful.
Which screen reader are you using? I didn't test how this site works with a screen reader, perhaps there are some improvements that need to be made. Do you find that a screen reader gives you good enough understanding of the menus and key elements of this site (comparing to other sites)?