Quoted from jints56:Not for me. 1 file is 4GB exactly and the other 181MB. I've used this same usb stick to upgrade .89 and didn't have an issue.
I had this same problem last night when I downloaded the update to a Mac (never had an issue before). This morning I downloaded to a PC running Windows and the mainfile was smaller (slightly under 4GB). I was able to copy it to a USB stick fine this time and updated my machine.