How do i access files on my host computer from the docker?

Hey! I am curently running a docker with radarr on my raspberry pi with dietpi OS. To the raspberry pi i have connected an external harddrive. I am able to acsess from /mnt/HDD.

But i can't get radarr in my container so see the folders. It is only able to see /mnt/ but nothing inside it. I would like to give the container full access without deleting anything there.

Thanks for the help! 🙂

submitted by /u/Crecent00
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Source: Reddit