You can speed up your PC and laptop by cloning HDD to SSD free. But Windows does not come with a free disk clone tool. Fortunately, there are some great free SSD cloning utilities to clone HDD to SSD ...
No idea why the SSD isn't listed as a boot option. The only thing I can think of is that the BCD on the 4TB drive isn't configured properly, or the boot files didn't get copied properly to the EFI ...