I upgraded a drive and the old one now has a red dot. Can I remove it?

I upgraded a drive and the old one now has a red dot. Can I remove it?

So I updated a drive with a larger SSD. Same drive name. Now I want to make sure Peakto can see it and process images. The old drive seems to also be present with a red dot (is that mean offline?) I tried to move it to the Trash CMD-Del, but it remains there. Is there another way I can clean things Up?