So I am going to bump this post since this happened to me 2 additional times. I just opened a project my editor did- a Wedding reception. It came up completely different. The one camera was missing from the timeline. There were huge black spaces where footage used to be. Some footage was not playing. Sometimes when I ran my mouse over the black space, footage would appear then disappear.
To answer your questions, I am editing off a USB 3.0 Hard Drive and all of my render files except for Autosave vault are in a folder called FCP files on the hard drive.
So video, audio render, capture scratch, etc —-> All on the USB 3.0 Hard drive
Autosave Vault —-> all on my main computer’s hard drive (in case something happens to the USB 3.0 hard drive).
There is 1.4tb of empty space on the harddrive (it is a 4gb hard drive)
On my main computer I am editing off of (and where Autosave goes) there is 280 gb of free space.
I tried deleting all my render files. I tried deleting the main final cut pro plist files. Is there anything else I can try? Nothing helped restore my project.