You can easily migrate or move iPhoto Library to RAID 1. RAID (i.e. Redundant Array of Inexpensive Disks or Redundant Array of Independent Disks) is data storage technology which uses multiple disks to provide fault tolerance and improve performance. It combines multiple physical hard disk drive components into a single logical unit.
If you want to move an entire iPhoto Library to an external hard drive or RAID 1, then make sure the drive is formatted Mac OS Extended. Now first quit "iPhoto" and go to "Picture" folder and copy the iPhoto Library to an external hard drive or RAID 1. Hold down the Option key while launching iPhoto and select "Choose Library" and then locate the new location. You can check the migrated library and when you sure that all is well, then delete your library to free up space on Mac. This way you can migrate your iPhoto Library to an external hard drive or RAID.
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