I received L616 on my 622 yesterday or this morning (straight from L614). My USB drive folder was not displayed. Attempting to go to MyMedia brought up a message that the attached USB device was not supported by Dish (it has been since the beginning of USB drive support). Rebooting the drive did not help. Rebooting the 622 resulted in the DVR asking to reformat the USB drive so that it could be used. Since I have all but 5G of the 400G drive filled with unwatched video, I do not want to reformat. I filed a problem report with Dish but since I'm not seeing anyone else report this problem my chances for a fix are probably minimal.