Question System doesn't detect hdd and ssd

[Etern6l_Sp1te]

Hello.
Built today my first pc from scratch, everything seems to boot up properly except, when starting the PC I am greeted with the messege "please connect a video output" and then automatically redirected to the BIOS (x470 gaming pro motherboard) on which neither my ssd or hdd can be seen. I tried already to put them in and out and did everything the manual said. What may be the issue?
I dont think they are both broken because I just used the same ssd earlier on my laptop and just bought the hdd.
cheers

 

[rgd1101]

full system spec? include make and model of the psu

 

[Etern6l_Sp1te]

full system spec? include make and model of the psu

Nevermind, solved it. I was stupid and forgot to connect the drives to the PSU...