I have a new Packard Bell laptop (the previous one is in for repair). I have taken the olf HDD and inserted it into a USB carrier thing. I would like to have the choice of booting up from either the on board HDD or the USB HDD to access apps and data from both. I am assuming that the USB HDD will have all of the bits and pieces to allow this, but I am being put through a rigmarole of repair etc. I have changed the BIOS to have the USB HDD as the primary boot device. Any other tips much appreciated.