I'm assuming the methods are similar. What I've been doing is just doing basic images to my external HD, which happens to be a SSD. After three images (three weeks) I delete them and start over again. Let's say I imaged the 1st of the month then a Diff or Incr on the 8th, again on the 15th and finally on the 22nd. Now something happens on the 23rd and I want to restore the PC to the way it was on the 22nd. Do I select the base archive plus the 22nd Diff or Incr? If so, is there a prompt to do so? Or, do you just select the date of a Diff or Incr? Lastly, which method consumes the most space over time on a HD, the differentials or incrementals? Thank you!