An iMovie library holds all the media and data supplied to make movies in iMovie. If your iMovie library is huge and you want to cost-free up storage an are on her Mac, you have the right to move her iMovie library come an external drive.

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Before you move an iMovie library, it"s a an excellent ideato earlier up her Mac.

Moving her library come an exterior hard journey doesn’t impact anyiMovieTheater contents you havemoved come iCloud.

You deserve to store your library ~ above an outside storage machine such as a USBThunderbolt journey formatted together APFS or Mac OS expanded (Journaled). doesn’t recommend save on computer iMovie libraries on outside storage gadgets like SD cards and USB flash drives, or drives common on a network.

You can’t store your library top top an exterior drive or other disk supplied for Time machine backups.

Quit iMovie.Select your outside drive in the Finder, then choose document > obtain Info.If the information in sharing & Permissions isn’t visible, click the triangle
, then make sure the "Ignore ownership on this volume" checkbox is selected. If it"s not selected, click the lock icon
to unlock it, enter an administrator name and password, and then select the checkbox.Click your desktop computer to make sure that you in the Finder, then select Go > residence from the food selection bar at the optimal of your screen.Open the movies folder, then drag the paper named iMovie Library come your exterior hard drive.When the library record is finished copying to your outside drive, double-click the library record on the external drive to open up it in iMovie.If an alert appears asking you to give iMovie access to a removable volume, click OK.If you clicked Don"t Allow, in the Finder choose menu  > system Preferences, click Security and also Privacy, then click Privacy. Click Files and also Folders in the sidebar, then pick "Removable Volumes" under iMovie.Make sure the library you moved has all her media, then traction the original record from her Movies folder on your Mac come the Trash.

When your exterior drive is connected to your Mac, the library you relocated to the outside drive opens automatically in iMovie. If you disconnect the external drive include the library, iMovie opens up to a new, empty library produced in the movie folder on your Mac. IMovie instantly saves any type of projects you create and media you income in the brand-new library.

If you desire to open up the library you relocated to an exterior drive, you can open it after you reconnect the external drive. You deserve to thenmove clips, events, and projects between libraries.

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