Have 500GB internal drive (IHD) and 1G external USB3-attached hard drive (XHD). IHD is GPT, XHD has not been formatted. I need to be able to create a bootable clone on the XHD, +++AND+++ I need to be able to reverse-clone from the XHD (larger) to the IHD (smaller). I'm tired of wading through all the advertising speals trying to determine who supports this and who doesn't. I've looked at MiniTool, Partition-Wizard, AOMEI and ACRONIS, but I just don't have all day to read through all the blitz only to discover that the product literature didn't answer my question or that it doesn't support my requirements. I use SuperDuper on my MACs; looking for a similar product for W10.