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#11
Recommended basic backup strategy:
Use disk imaging routinely. a. For Windows (all system partitions) b. any other disks/partitions
Create and store your images on an external storage medium.
E.g. Macrium Reflect (free).
Having two disks that look like an OS is very likely to confuse certain repair operations and build upgrades.
Best to keep personal data off C:
Your system disk seems ok as regards its partitions.