I had recording to a usb pen drive (4gb duracell) working with Dream Elite but now with the Oozoon image it fails saying no partition detected. Origionally formatted ext3 in the pc now it will not re-format. There are options for 'master boot record' and 'GUID' formats, which should I use? Should I be looking for flash drives with faster read/write speeds or could the drive just be incompatible?