The Win 10 'File History' (FH) backup works pretty well. It automatically backs up every changed file and, by looking in 'properties' for a file, you can see and restore any previous version.

I use a passport drive too. It assumes you keep it plugged in but, like Acme, I don't do that to stop malware zapping it. That does mean I have to start FH manually when I plug the drive in, at the end of a work session. It ought, IMO, to notice the drive and automatically do any overdue backups.

The old Win 7 backup is also available in Win 10.