Well, the crashdump is just going to show you just what caused the crash, and being a minidump, it's lucky enough to go so far as to tell you that! Though in this case yes, the USB device was the problem.
The only way one could tell what was going on with your slow boot up would've been via the etl logs requested in the aforementioned thread. That's what Kaktussoft was referring too in the previous thread: to post the .etl with that huge filename for inspection, not to type it as a command.