> My CPU overloads like crazy.
What makes you think so? Does it overheat? Is the "load average" too high?
Where is the CPU time spent (i.e. e.g. what does `top` say, is it mostly
in "wait"? "kernel"? "user"?)?
Have you tried to install a similar (tho probably smaller) VM on your
internal storage just in order to see if the problem comes from the
external storage or from the VM itself?
Stefan