They are Prores Proxy files. I re-edited my original post a bit.
My idea of proxy is a file that connect to the original footage. It seems like prores proxy does not? They are just low quality files (I’d love to be wrong about this, but I think that’s the case). Basically, I don’t want FCPX to treat these prores “proxy” files as master files / source material.
and I have tried tricking FCPX by renaming a folder and relinking them to the h264 files (the 5d footage) but thinks it’s completely different footage.