[Snapshot Pro] Snapshot Pro - Gateway timeout

Hi, i have been following your guide here: https://premium.wpmudev.org/blog/sync-staging-live-sites-wordpress/ and was making a copy of my live site, but every time the progress bar gets to 48% and i get Gateway Timeouts (504). Both Max execution time and max input time are 10000 odd and the memory is 1024m.

I have a couple of screengrabs to show if required, but it's when it's handling the media folder it stops.

Any ideas?