Truck - A faster alternative to FTP
Snappr - Stunning photography on-demand, at affordable fixed prices
arRsync - arRsync is a tool that is designed for macOS that is used for transferring and synchronizing files between a computer and a storage drive.
SmartShoot - Find a photographer or videographer for your project
Synchromat - Synchromat is file and folder synchronization software for Windows.
Ooshot - Hire a photographer. Fast and secure.