[britmob]

Resilio Sync (formerly bittorent sync) is my go-to for any file larger than a few hundred megabytes.

[misterbwong]

Same here. I use this to deploy large files to my VPS

[willcipriano]

I third this suggestion, if you have to send the file to multiple parties they can all share among themselves (it's BitTorrent after all) speeding up the process even further.