I've never done this the way you describe. I've always had the best luck downloading the full os file from the vendor website; for VZW this is BlackBerry® Software Updates
Then expand the downloaded file, launch desktop manager and let it detect the new software and run the install. If it's a new device with no data you can de-select the optional device backup. It takes a while to do ( the reboot seems to take forever) but no way it would take this long.