Final Cut Pro X: Create a new library
You can create new, empty libraries, or you can create libraries from existing events.
If the Libraries sidebar isn’t already shown, do one of the following:
Click the Libraries button in the top-left corner of the Final Cut Pro window.
Choose Window > Go To > Libraries (or press Command-1).
Do one of the following:
Create an empty library: Choose File > New > Library, then navigate to a location on your Mac or storage device where you want to save the library.
Create a library from existing events: Select one or more events in an existing library, then choose File > Copy Events to Library > New Library.
The new library appears in the Libraries sidebar.
Note: With Final Cut Pro 10.4, you can save a library to a SAN (such as an Xsan storage volume) or an NFS or SMB file system volume and use it as if it were on a local storage device. A network SMB volume must originate from either a macOS server or a Linux server that has Samba 4.3.4 or later and is configured with modules for Apple compatibility.
For more information, see the Apple Support article Use shared storage with Final Cut Pro X.