PS4 Pro rattles?

I bought a PS4 Pro 2 days ago because it was on sale and last night it rattles quietly when I'm playing a game, what can it be? If it is the drive, is it the fan or the hard drive. An answer would be very nice and helpful

Why do you buy a ps4 instead of saving a little and waiting until the ps5 is available

Because I don't want the PS5

I'm not the specialist now. But if the thing is brand new then please contact the seller. That seems to me to be a guarantee case (regardless of whether the fan or the HDD is damaged).

Logical

Yes, I'll be staying with the ps4 for at least another 2 years