SSD not recognized on Mac Mini

I just installed an SSD on a Mac mini. I am trying to recover my data onto the new drive from an external hard drive using time machine. The Mac recognizes the backup drive but not the new SSD. I opened the machine up again, all cables are connected and not damaged. Am missing a step or something? Any help would be greatly appreciated.

We need a little more detail. Which Mac Mini (part of year and year would be sufficient, e.g. Late 2014). Also, which OS are you using? What is the config of the disks? Are you booting off of an internal HDD and attempting to install an internal SSD? When you say that the Mac doesn't recognize the new SSD, where are you looking? Disk Util? Also, we'd like to know the brand which version of SATA of the SSD. As much detail as possible.

I figured it out, I had to erase and format the drive in disk utility in order for it to be found.