How to open any application in sys-usb?

I try to open terminal application and files application in sys-usb,
but after some time, it doesn’t show up, is it expected ?
Anyone know how to open applications in sys-usb ?

You can check what error sys-usb is giving to you in dom0:
qvm-console-dispvm sys-usb
Maybe you don’t have enough memory in sys-usb?
Or maybe you have the same problem as here: