I am looking for an app that runs from a bootable USB stick and will let me save and restore a partition (to/from an external hard-drive).
If you want additional info, I want to have a rescue US stick for my Widows install.
Not the entire disk, just one partition (c:\ - there are tother partitions on the same disk).
A bonus would be to be able to copy individual files from one to the other & back again. Or, indeed, to view file contents, etc, but that is just "nice to have" and very low runner.
But, really, just 100% rock-solid "clone partition, with no problems with open files" is sufficient.