Hard drive not recognized

[Plasteret]

Hey friends!

 

My friend just built a new system and his 4 TB Seagate Barracuda 5400rpm hard drive isnt showing up. We checked that it was fed with both power and data connection to the mobo. we even tried changing cables. The thing is, the hard drive showed up when we were installing windows and we scelected the SSD (of course), but when we got to the desktop, the HDD wasn't showing up in the file explorer. Could this be bios settings or hardware issues? A quick response would be good because he practically renders the pc as useless without the 4 TB space. I don't know the exact specs of his system, but if it's important then I can ask him. (the parts I know: RTX 2060, An rog Strix mobo + I5 9400f, Corsair 550-watt PSU, Kingston 240gb nvme, and of course the HDD.

[SpookyCitrus]

You have to format the drive in disk management if it is new or recently wiped. Otherwise it won't show up in file explorer.

[Plasteret]

Thanks for the help! It turns out that that was the issue!