Try using a different USB port then, USB2.0 ports if possible, or, as stated above, use another different distro such as Ubuntu and then install MineOS on top of it. The MineOS distro seemingly isn’t able to find/locate the drive and/or files after the initial portions load (kernel and all) that it needs to load the remainder of everything else, so there’s not much else you can do unless you build your own version of the distro from scratch or something along those lines.