This is the most likely problem. There is no way the output from fdisk should be different between the two connections (the USB and SATA) if they are both working correctly.
To stop the lightdm from starting, you should be able to disable it by this command:
sudo systemctl disable lightdm
If XFCE still starts automatically, then check your .bash_profile. If there is a line like:
exec startxfce4
then put a # in front of it. Once that is done, you can start XFCE any time by typing exec startxfce4 at the command line. When in XFCE, if you log out it should put you back to your command prompt.
I think this is misleading. As the aero of the cars improved over the years, it made the air following the cars more turbulent, thus making it ever harder to pass. This was a main factor in introducing DRS.
Yes - I have been running IPFire on an old desktop for several years now and I really like it.