Data migration software not working

[GALAXYVINE]

I 'm trying to use the Data Migration software to clone my old OS drive(SSD EVO 860 250gb) to a new 970 EVO Plus NVMe M.2  1tb.....I downloaded the Samsung data migration software. Very simple process, did exactly as it instructed. It shut the system down on it's own. When I rebooted I went into Bios as I've been told, in order to reassign the boot drive. Went to restart......and it doesn't work!
Here's shots of how I have it set up, and then the error I get when trying to boot from the new 970 Evo. In order to get the system back up I set the old Evo 860 SSD to boot from.
What am I doing wrong???.......please help.

two notes......I did NOT format the new M.2 drive as the instructions did not request that.  My PC is a few years old. Running Win10 Pro

[GALAXYVINE · Accepted solution]

Update.....problem solved. I hadn't disconnected the old OS drive, so there was a conflict. I disconnected the old drive and the new M.2 booted up perfectly 😉