You may be on to something. I didn’t hear Rush (peace and health be upon him) but I don’t see any basis to conclude this was done on purpose, and least not beyond the extent you theorize.
To do this on purpose would require way too much forethought on Hunter’s part. Plus he could not be sure that the data would be found.
Once I got the Laptop to boot up and I saw a bunch of files and directories on the hard drive, I would say OK, stop there, call the guy and have him pick it up. This guy knew who dropped it off, the 90 days had expired, so it was his now, heard the Hunter stories of Burisma, and thought what the heck, let’s poke around and see what is on here.