eia,
You will need to insert a USB drive in an open USB Port that will then become the U:\ drive for the system.
If you already have a USB drive on the system then the U:\ drive is already up and working.
Keep in mind that the older CS Controllers used a green USB Dongle that looks similar to a USB Drive, but this is used to license the system and should not be removed from the controller while it is running.
Also keep in mind that when the system saves to the USB Drive (U:\) it will delete anything it finds in that directory so it is best to specify a folder so you don't lose any other data on the drive. I typically use U:\Audiotex\ as my drive path so it that it creates an audiotex folder on the drive and puts the information in there.
Thanks,
TE