Chris Breen recently showed how to do this . You can do the same thing with a Folder Action created by Automator, as explained above. Check Chris’s article to find how to do this. You might want to set up a number of folders for different projects—each with its own Folder Actions that tags files with Spotlight comments for different projects.

3. Automatically compress files

Need to send or store some big files? You can create a Folder Action that will automatically create of files you add to a specific folder. Launch Automator and select Folder Action in the template sheet that appears. Click Choose.

At the top of your empty workflow space, click on the Choose Folder menu and select the folder you want to attach this action to.

From the Library column at the left of the Automator window, click on Files & Folders. Click on Create Archive in the second column and then drag this action to the workflow space to the right of the Automator window. In the Create Archive action, choose where to store the archive. You can choose either Same Folder As Input, or a different folder.