.FCARCH File Extension
File TypeFinal Cut Pro Archive
File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.
What is an FCARCH file?
Archive created and used by Final Cut Pro X (FCPX), an OS X professional video editor; stores a backup of video that has been imported into FCPX.
NOTE: FCARCH files are located in a folder titled "Final Cut Camera Archives" in the same location as your Final Cut Pro events and project folders.