Welcome to the TH Community, Ysabag!
Can you please provide more details about your computer configuration and specs?
I'd also ask you to share all the things you have done so far to successfully install the SSD in your system.
I'd start the troubleshooting by making sure the SSD is properly connected and even swap the SATA cable that is connecting it to the motherboard. Just like @CountMike mentioned, make sure it's connected to a SATA III ( 6Gb/s) port on your motherboard.
Keep us posted!
SuperSoph_WD