Problem with booting - Legacy Mode TrueNAS-25.04.2.1 SCALE

Hello everyone, this is my first post and approach to TrueNAS.

I’m having problems with my current configuration of my Storage device. When the device is turned off and turned on again, the OS doesn’t boot by itself. Instead I get a screen with a message like this: “This is a TrueNAS Storage Drive”. I found that the drive where is installed TrueNAS is not detected on BIOS, I only can find my 36 Storage Drives, but nothing else.

When I looked at the BIOS, I found that the Boot Mode was set on Legacy, so I tried switching to UEFI. When I did that, I opened again the BIOS and the Storage Drives dissappeared, but at least I could saw the TrueNAS OS drive. When I tried to boot from that drive, I got an screen that said “Welcome to GRUB!” and got stucked there.

The only way that I can boot the device, is by pressing F10 and choosing manually the drive. But I would like to make that the device boots by itself. Is there anything I can do to solve this issue?

I’ll be looking for any comment if you need more info to help to solve this.
Thank you!