Hi James.
In this case you can copy the startup-config file to another directory using copy startup-config {ubication} and then you can copy from that file if you think is necessary to restart the current startup-config again from copy {ubication} running-config, but if you are looking for export to another devices you can copy the configuration to a FTP, in this link you can see all the information.
http://www.cisco.com/c/en/us/support/docs/ios-nx-os-software/ios-software-releases-122-mainline/46741-backup-config.html
greetings.