Help please! - Windows does not recognize 30 hdd

I just finished plotting 30 4tb hdds, but my harvester only recognizes 15 hdds (sometimes less) - you know what the problem could be?
These are my specs:
windows pro
psu 650 watts
ryzen 3
3 sata 3.0 expansion cards (10 ports each)

My first guess is psu is overloaded.
650w probably only has 20A max load on the 5v rail,
30 hdd’s can draw up to 30A.
Also voltage might drop to low that way.

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