This has been my backup solution for years and it has mostly worked well. If there is an issue with the operating system like Win update wipes it our or a user error or a virus or something - just boot off the clone drive.. and lose whatever data you did not copy over in the last say 3 weeks since the clone operation. User data should probably be backed up in another way, this is mostly operating system stuff. 4 SSDs in the machine.. the primary Win 10 boot is designated as Samsung, PM981. Which is cloned to Samsung PM951 and can be selected as an alternative boot. Which is also cloned to the Samsung 860 EVO SATA M.2 SSD and can be selected as another alternative boot choice. I clone more or less without a schedule, when enough major changes have taken place. I worked with just 2 clones (1 primary and 1 clone) for years until an accident a few days ago wiped out the EFI partition on the clone *and* the source, I was down for days. I am not sure I will keep the disk #3 in the clone capacity or delegate it to something else, maybe throw Linux on it. The 4th drive, the 2.5" 860 SATA is just a data disk. Surprisingly, despite labeled as 1TB, they are not equal. Something about being managed by the system, PM981 and PM951 appear to be identical space-wise while 860 EVO M.2 and 860 2.5" unit are a bit less, strange. I am actually surprised a clone to 860 EVO M.2 worked at all. Question, what is that last partition in disk0? "Healthy (Primary Partition)"?