I also back up my PC's data to my primary external drive, and like your case, that data set is fairly small and therefore fast, so that's not an issue. The wrinkle in my case is that my primary external drive contains backups of my PC data, but also contains the primary copy of other data that's too large and not important enough to store on my PC, such as my collection of movies and TV shows and a backup of my parents' large music library. But all of that gets backed up when I replicate my primary external drive to my backup external drive, so I basically have 2 copies of my "entertainment" data and 3 copies of my more important PC data (plus an additional cloud backup of my truly irreplaceable data). But the issue is that my 4TB external drive has about 3TB in use, so performing a Full image backup of that entire drive onto my backup drive would take quite a while, much longer than a Rapid Delta Clone or even a file-level sync to copy updated files over. And again, since my primary and backup external drives are the same size (4TB), I doubt I'd be able to store two Full backups of my primary drive on my backup drive anyway. I admit I abandoned the Windows image tool quite a while ago. Part of the reason is because Microsoft essentially deprecated it after Windows 7. For Windows 8, it was buried under "Windows 7 File Backup", and in Windows 10 it's only available via command line (EDIT: Win10 1803 has it in the GUI, so either this changed somewhere over Win10's various releases or my memory failed me.) And although it has value just by being mountable, the System Image Restore tool is a joke. Its limitations compared to tools like Reflect are too numerous to list here. But more importantly, my image backups are primarily for convenience rather than necessity. I back up my Data partition using file-level syncing so that my data is available "directly" on my external drive rather than in a container file (maintaining historical versions isn't important for my use case), and if my entire OS environment got hosed, it would just be an inconvenience. I work in IT and have done plenty of clean installs, so I can do them fairly quickly if needed. So although I do use Reflect to capture an image of my OS partitions occasionally, such as prior to a large update to have a quick recovery mechanism if needed, it's not something I depend on for my personal PC and data.