Thank you guys for telling me the email got lost. I'll just describe it.
The partition table is GPT.
Imagine you're looking at the graphical presentation of my hdd in GParted.
Starting from the left:
858GB NTFS partition (intended for storing all kinds of data)
then
20GB ext4 partition, with mount point /
then
2GB ext4 partition, with mount point /home
then
1GB swap partition
then
50GB NTFS partition (intended for windows)
then, finally
only 10MB FAT32 partition because debian installer says I need an efi but I don't know how big it should be. Mount point at /boot/efi
If I boot from the hard drive, I ge this message:
Realtek PCIe GBE Family Controller Series v2.43 (08/25/11)
PXE-E61: Media test failure, check cable
PXE-M0F: Exiting PXE ROM
Reboot and Select proper Boot device
or Insert Boot Media in selected Boot device and press a key
That's it. Thank you!