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If you're done with the project or you won't be going back to it for a while you can delete them, they can always be recreated as long as you haven't deleted your source video or the project files. But depending on what they are it can take a little while to regenerate them.

What they are: As you work with the source video and add things like effects and transitions the render files are created - merging all the elements together. They allow you to watch your work in real time before you export it.
 
I keep my render scratch set to a different HD. When I have completed a project I simply trash the folder containing all the render files the FCP has completed for the project and have had no problems in doing so.
 
I realize this is an old thread, however, it's relevant to my question and so I'm posting here rather than creating a new thread.

Having said that...

Is it possible to set FC to either render to an external drive or copy the the files from my Mac HD to an external drive for use on another system?

What's happening is that we're editing some footage on two different systems. The footage and the FC project files are on an external drive. Every time the drive is brought to a different system after changes to the edit have been made, we're having to render the sequence to view in real time.

Is there any way to avoid doing this by having the render files included on the external drive?
 
I realize this is an old thread, however, it's relevant to my question and so I'm posting here rather than creating a new thread.

Having said that...

Is it possible to set FC to either render to an external drive or copy the the files from my Mac HD to an external drive for use on another system?

What's happening is that we're editing some footage on two different systems. The footage and the FC project files are on an external drive. Every time the drive is brought to a different system after changes to the edit have been made, we're having to render the sequence to view in real time.

Is there any way to avoid doing this by having the render files included on the external drive?

Final Cut Pro > System Settings >> Scratch Disks

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Thanks, simsaladimbamba!

Does the FC project file retain this setting? Or would this be set up on each system before opening the project?

If it's the latter, when this setting is done on the remote computer and the project is opened, will FC automatically know to link the proper render files so to avoid all of the re-rendering?
 
Thanks, simsaladimbamba!

Does the FC project file retain this setting? Or would this be set up on each system before opening the project?

If it's the latter, when this setting is done on the remote computer and the project is opened, will FC automatically know to link the proper render files so to avoid all of the re-rendering?

As far as I understand, it is not for the project, but as you can add several HDDs to this, FCP will know where to look for the rendered files.
 
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