Yes. Problem was FreeBSD couldn't boot.
But I solved problem :D.
Problem was an error during partitioning disks.
And I changed from FreeBSD to ghostBSD. GhostBSD is better than FreeBSD for new BSD users :D.
I can run FreeBSD in Virtual Box.
My problem is FreeBSD booting from usb in installation.
I will watch this video. Thanks for your quote.
Edit: The first video is for legacy mbr. But my machine is GPT/UEFI.
Hello. I just allocated 190gb of space in the FreeBSD installation and formatted it as a UFS file system. There was a problem after completing the setup.
After FreeBSD restarted, the debian linux GRUB screen was coming up. I have never been able to boot FreeBSD from the hard drive. Resetting...