

The best bet is to install the operating system on the high-performance SSD while leaving the other programs and personal archives on the old HDD, with much more capacious storage. Nevertheless, you don't need to put all Windows stuff in the new SSD. You will definitely see a tremendous change in the Windows 10 startup speed after swapping to a lighter, more compact, and more durable Solid-State Drive.

Instead, upgrade your HDD to SSD, or replace the smaller SSD with a bigger SSD. "Should I upgrade my computer now?", when asked by some friends who underwent a slow hard drive, my answer is "not really".

