How do I Write Protect an external USB Drive

Discussion in 'OS X El Capitan (10.11)' started by swandy, Dec 13, 2015.

  1. swandy macrumors regular

    Joined:
    Oct 27, 2012
    #1
    I have an external USB drive that is formatted for Max OX Extended (Journaled). It has a backup of my music collection so I want to write protect it so that it can only be READ and not erased or any of the files erased. How can this be accomplished - running an iMac and El Capitan.

    I have tried right clicking on the drive and the sub folders in Finder and changing the Read/Write attributes to READ ONLY for myself and everyone, but I can still delete individual files.

    Thanks.
     
  2. Shirasaki macrumors 603

    Shirasaki

    Joined:
    May 16, 2015
    #3
    If hardware supports it, achieving read only would be very easy, like what some SD card does.
     
  3. Falcon16 macrumors member

    Falcon16

    Joined:
    Sep 26, 2015
    #4
    you'd want to check the option in the permissions so that the individual files in the folder inherit the permissions of the parent folder
     

Share This Page