I can't see both disks at the same time

hi,
Today I set up my first truenas core server.

The machine is Futro s720 with
RAM 8GB
128GB mSata disk for system
500 samsung and 300 hitachi gb hdd for data(both connected via USB)

I try add pools and the problem is that I can’t see both disks at the same time. If I disconnect the Samsung I see the Hatachi, if I connect the Hitachi again I only see the Samsung.

In shell i write "camcontrol devlist"and i see them all

USB attached drives are not supported and you are at the bare minimum for RAM.
You need to pick different hardware.

https://www.truenas.com/docs/scale/24.04/

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