TriX wrote:
1) how much unused space do you have on the original C: drive? You might post a screen shot of disk manager - that would be helpful.
2) most SSDs come with cloning SW. Lacking that, download the free version of Macrium reflect. Clone the drive, then unplug the old C: drive, and it should boot. If it won’t then, go into your BIOS and look at the boot order and make sure the new drive is selected.
3) BTW how do you have the new C: drive connected while cloning?
It might be wise to create a separate partition, unless you need more space for the OS or programs. Never bad to have data storage on a separate partition.