Fistly: QRecall looks pretty much like the smartest backup solution I have seen sofar. And have tried many. Win and Mac. So hats off!!
After about two weeks of nightly backups without any hitch whatsoever (om my Fast-USB-drive, 500 Gigs, with 400 gigs free space and a backup size of 57 Gigs, QRecall is busy "locating free space". Is this normal behaviour?