[Shawn Crochet] “-set new storage locations for the library”
That’s all you need to do. I typically set the storage location as a folder in with the rest of the media. I usually call it “ProjectName_FCPX_GeneratedMedia”. This folder is a repository for copied media, rewrapped media, and optimized/proxy transcodes.
Your colleague will have to setup a folder, and if there’s already one setup, then he imply needs to point FCPX to where that folder is on the drive. Typically, this folder remains empty for me as I don’t rewrap media, and I rarely generate optimized or Proxy files.
As far as the Cache, he needs to setup a new cache location, which is also very easy. I do not keep in the cache in the library (as it will get huge). I have my cache set to my boot drive, but you can put it anywhere, hopefully on the fastest drive that is attached to the machine, and can handle the space.
Once these small pointers are setup, he will be able to reconnect and edit.
Jeremy