I recently installed Debian "Stretch" amd64
on an external HDD.
What I have done:
1. Created a 64GB ext4 partition for mount point / .
2. Created a swap area.
3. The rest is unallocated.
4. Chose to install as non UEFI.
5. Installed GRUB on external hard drive.
6. Finish & restart.
Key info:
1. External HDD is 1TB and not GPT.
2. I used Debian 9 amd64 installer.
3. My bios is set to legacy boot.
4. Booting to my external hard drive gives me "Operating system not found"
How can I solve this? Or