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Dec 18, 2014 9:35 AM in response to LizRuaneby judysings,Hi LizRuane,
Happy Holidays! I'm not sure from your question if you are wanting to move your iTunes library to an external drive, or if you have various mp3 and movie files on your computer that you want to move to an external drive. So, I'll give you some basic information for both scenarios.
The first step is to make sure your external drive is formatted for Mac.
Format external drives to Mac OS Extended before using with Aperture - Apple Support
http://support.apple.com/en-ca/HT201909Before you begin to use your new external hard drive, reformat it to the Mac OS Extended file system:
- Be sure your drive is attached and mounted.
- If you have already written any data to the drive, back it up before proceeding to the next step.
- In the Finder, choose Go > Utilities. The /Applications/Utilities folder will open.
- Launch Disk Utility.
- Click the icon for your external hard drive in the sidebar on the left.

- Enter a name for the external hard drive in the Name field.
- Click the Erase button.
If you have miscellaneous mp3 or movie files on your computer that you want to move to the external drive, you can use the Finder application.
OS X: Manually migrating data from another Mac - Apple Support
http://support.apple.com/en-ca/HT202910Copying your Files
Use an external drive
You can copy your important files to an external drive to move the files between them.
- Connect the external drive to your Mac.
- In the Finder, locate the external drive. If you don't see it, choose Go > Computer to see a list of all of the drives connected to this Mac.
- In the Finder, drag any of the files you want to move to your external drive to make a copy.
If the mp3 files and movies are already in your iTunes library, you can copy the entire library to your new external drive:
Back up your iTunes library by copying it to an external drive - Apple Support
http://support.apple.com/en-us/HT201625Hope this answers your question...
- Judy



