No matter how mysterious you want to make it,it is clear you don't know what you want to do.
Most people is trying to help you to upgrade,which is the way the box reads a bin file from the usb stick,but what you want to do is totally different than this.
It will never work on such a way.
If your intention is to install an emu (and do not matter which emu),you better read the guides posted in this section,because it is obvious you need to read a lot yet to understand how this box work (openxcas/emus)
I'm sure you do not even know if the bin you try to install is compiled for this box (meaning matching architecture)
And all this comes to be because you are not telling EXACTLY what the bin is about
You can probably install it with 2 clicks on the remote from the online servers,but nobody can guess what is it.