Hi I have just recived my new xspeed lx2 and I thought I would make a backup of the box before I started altering things

I saw and WOS website on how to make a full backup of the system, I followed this advice to the backup manager and it says after mounting a usb device (It then says be careful no to use the internal flash memory) I then tried to change the destination of the backup to the usb and made a backup.

But now if the usb stick is not in the machine it say this device need formatting so where has the internal flash memory gone?

What have I done wrong

If I reflash the Vix will it replace every thing as it was and if so how do I do it please