Things You'll Need:
- Mac running OS X 10.5 or later, external hard drive
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Step 1
Open System Preferences by clicking on the icon in the dock.
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Step 2
Go to the "Time Machine" control panel underneath the "System" category.
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Step 3
Click the "Options" button in the middle of the control panel window.
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Step 4
Click the plus sign in the lower-left corner of the pop-up window.
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Step 5
Select any folders or files that you do not want Time Machine to backup, and then click "Exclude." Time Machine will not save any of the selected files during future backups. All files not selected will be backed up.







