Can I lock an external hard drive? I have two identical hard drives. One is the one I will keep updating frequently, the other will be a backup that I update less often.
In order to avoid confusion, I would like to &quot;Lock&quot; the second hard drive the same way you would lock a folder from its &quot;Info&quot; panel, here:

However, for drives, this option is not present:

Is there a simple, quick, Mac OS native way to make the drive locked to prevent mixing them up?
I tried to set permission to &quot;Read Only&quot; but it still allowed me to make changes on the drive (like move a folder inside another).
I have a disk image on a drive which is passworded.
Seems to work fine but whether it will suit you...
See https://www.google.co.uk/amp/s/www.howtogeek.com/183826/how-to-create-an-encrypted-file-container-disk-image-on-a-mac/amp/