I have a brand new 750GB USB3 hard drive, with no files on it, that I want to use for backup media. Get Info confirms the amount of free space on the drive. But when I create a new media set and point to that drive, Retrospect says that 100% of the drive's capacity is 697GB. I tried to change the 697 to 740, but it changed back into 697.
How can I make Retrospect use the full capacity of the drive?