4 Replies Latest reply: May 15, 2014 2:52 PM by axeen
LincolnColorado Level 1 (0 points)

Today I archived around 80GB of idvd projects onto my external hard drive, then deleted them from the internal HD and emptied the trash and restarted my computer..  I was trying to free up hard drive space.  However when I look at my "About this mac" storage report it shows that I have approximately the same storage as before.  What is really odd though is that bar at the bottom of my finder window shows that I have 174 GB available.  When I look at system information it also reflects 77.75 GB free.  Why the discrepancy?   Is there something else I need to do to delete the original videos from my internal HD?  I can't find them listed anywhere in my finder.  When I imported them and edited them in imovie, I located them in the external hard drive.  So unless I'm wrong the actual imovie video footage itself has always been on the external hard drive to begin with.  I only had them on the internal hardrive when I was working on the idvd project.  I'm not very astute at video or computer stuff, so maybe I missed something.



Screen Shot 2014-01-15 at 3.08.53 PM (2).png

MacBook Pro, OS X Mavericks (10.9.1)
  • Linc Davis Level 10 (192,629 points)
    You may notice a difference in available space statistics between Disk Utility, Finder, and Get Info inspectors. This is expected and can be safely ignored. The Finder displays the available space on the disk without accounting for the local snapshots, because local snapshots will surrender their disk space if needed.

    About Time Machine's "local snapshots" on portable Macs

  • LincolnColorado Level 1 (0 points)

    Great, thanks.  I've never heard of snapshots before.  But now that I know that the snapshot is reported under "backups" this creates another question for me. The "About this mac", storage report shows that I have 218 GB of movie space occupied.  Is there a simple way to see where those movies are located?  I'm not sure how I have so much movie space if my imovie and idvd movies are located externally.  I'm sure I have some in iphoto or itunes, but I doubt I have 218GB.  Any idea how I can identify those movies?  Thanks for the help.

  • Linc Davis Level 10 (192,629 points)

    Empty the Trash if you haven't already done so. If you use iPhoto, empty its internal Trash first:


    iPhoto ▹ Empty Trash


    Do the same in other applications, such as Aperture, that have an internal Trash feature.


    If you're using Time Machine to back up a portable Mac, some of the free space will be used to make local snapshots, which are backup copies of files you've recently deleted. The space occupied by local snapshots is reported as available by the Finder, and should be considered as such. In the Storage display of System Information, local snapshots are shown as Backups. The snapshots are automatically deleted when they expire or when free space falls below a certain level. You ordinarily don't need to, and should not, delete local snapshots yourself.


    See this support article for some simple ways to free up storage space.


    You can more effectively use a tool such as OmniDiskSweeper (ODS) to explore your volume and find out what's taking up the space. You can also delete files with it, but don't do that unless you're sure that you know what you're deleting and that all data is safely backed up. That means you have multiple backups, not just one.


    Deleting files inside an iPhoto or Aperture library will corrupt the library. Any changes to a photo library must be made from within the application that created it. The same goes for Mail files.


    Proceed further only if the problem isn't solved by the above steps.


    ODS can't see the whole filesystem when you run it just by double-clicking; it only sees files that you have permission to read. To see everything, you have to run it as root.


    Back up all data now.


    If you have more than one user account, make sure you're logged in as an administrator. The administrator account is the one that was created automatically when you first set up the computer.


    Install ODS in the Applications folder as usual. Quit it if it's running.


    Triple-click anywhere in the line of text below on this page to select it, then copy the selected text to the Clipboard by pressing the key combination command-C:

    sudo /Applications/OmniDiskSweeper.app/Contents/MacOS/OmniDiskSweeper

    Launch the built-in Terminal application in any of the following ways:


    ☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)


    ☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.


    ☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.


    Paste into the Terminal window (command-V). You'll be prompted for your login password, which won't be displayed when you type it. You may get a one-time warning to be careful. If you see a message that your username "is not in the sudoers file," then you're not logged in as an administrator.


    The application window will open, eventually showing all files in all folders, sorted by size with the largest at the top. It may take a few minutes for ODS to finish scanning your files.


    I don't recommend that you make a habit of doing this. Don't delete anything while running ODS as root. If something needs to be deleted, make sure you know what it is and how it got there, and then delete it by other, safer, means. When in doubt, leave it alone or ask for guidance.


    When you're done with ODS, quit it and also quit Terminal.

  • axeen Level 1 (0 points)

    Great with someone with some deep understanding of the OS and that can provide useful, detailed information. This really helped my confusion, as well!