Exporting Large File FCP X Keeps Failing

Hello,

I'm desperately trying to export a client project, its a 1hr. & 8 minute video project from FCP 10.4.3 timeline sharing out to an .h264 file. I keep getting this "Share Failed" message. I'm using an external G Drive 2tb Solid State drive (new). I never had any issues exporting with my G-Drive 6tb hard drive.

Any suggestion would be very helpful. Thank you for your help!!