"USB storage device detected. Please remove it before continuing. Press OK to reboot".
This can happen when a USB storage device is present, such as a card reader or a floppy drive emulator. Remove the attached USB storage device and restart the installation.
If removing the USB storage device is not possible, try to restart the installation and at the install boot prompt enter the following:
# linux nousbstorage
This will start the install program without it checking for USB storage.
Note: It is not possible to restore settings during install from a USB drive when using this install parameter.