Thank you so much! I’ve only got the one SSD and one HDD, sorry that I wasn’t very clear in my original post. But I think I can follow your detailed instructions and resolve this. I’ll report back when I’ve had time to do as you’ve described. Again, much appreciated!

I’m 99% sure I’m using Grub. I did go into my Bios to change the boot order and I also have it set up currently where it will give me a few seconds at startup to choose which drive I want to boot from while I figure my mess out.

No, sorry. My computer had a single HDD. Now I have a new SSD that I would like to add to the machine and use in conjunction with that HDD.

Sorry I can boot into either one and can change boot order via bios, yes. I’m trying to merge two installs now basically. I want my SSD to be my one and only boot drive but have all of the settings and programs from the HDD brought over to the fresh install. And then use both drives at the same time. If that makes sense. Sorry for any confusion.