I downloaded Ubuntu onto a cd and booted my laptop with it. When it was loading up it said something about checking filesystems. I just let it run until it was done. It then gave me an option to try Ubuntu or install it. I did the option to try it and it went to the desktop.
I then connected the HDD via this: https://www.amazon.com/dp/B073SB3PD4/ref=cm_sw_r_cp_apa_glt_fabc_4RDNJHV129BM7DWHNKNC?_encoding=UTF8&psc=1
The HDD model is this: Hitachi IC35L090AVV207-0
I opened Files to see if I could open and read the HDD but I don't see it in Other Locations. I then followed a guide and found that the name for the HDD I'm looking for is
sda. I then ran
sudo fdisk -l and then afterwards ran
sudo mount /dev/sda /mnt. However, it returned an error that said
mount: /mnt: no medium found on /dev/sda. What am I doing wrong?