If this error appears when you first open a project, it usually means your (like a Blackmagic card or generic OHCI) cannot handle the project’s resolution (e.g., trying to preview 4K on a 1080p card).
Verify your destination drive has enough free space and is not formatted as FAT32 , which limits individual file sizes to 4GB—a common cause for export failure in long projects. If this error appears when you first open