title: Unable to copy file into external hard drive: Read-only file system
body: <p>I am trying to save some important files from my faulty internal hard drive on my iMac. I am in the Internet Recovery mode and running the terminal. I also have connected an external 1TB storage and I can view the files inside it using the terminal. However, I cannot seem to write anything on the external drive as I get the message</p>
  
  <pre><code>cp: volumes/seagatedrive/backup.dmg: Read-only file system
  </code></pre>
  
  <p>I have used the <code>chmod 777</code> command for my <em>seagatedrive</em> to no avail. The message I get there is:</p>
  
  <blockquote>
    <p>Unable to change file mode on volumes/seagatedrive: Read-only file
    system</p>
  </blockquote>
  
  <p>How can I make my external hard drive (<em>seagatedrive</em> above) writable?</p>
  
  <p>Would appreciate any help.</p>