If you have a access to a JUC400 wormhole switch USB device, you can plug it in, then let it run its uninstall to remove its files when you exit. The leftover files are harmless, but aversion to leaving such remnants around is understandable. As others have suggested, you might want to clone the drive via a reliable utility that runs from a bootable USB stick, e.g.
Clonezilla, or its fully inter-compatible (perhaps easier to use) 'cousin'
Rescuezilla (both open source). You can use Rescuezilla to make a .iso image file of your old drive, and to then mount a copy of the image, which you can then edit, do extracts on, and so forth.