What are some alternatives?
Dropbox - Online Sync and File Sharing
rsync - rsync is a software application for Unix which synchronizes files and directories from one location...
Google Drive - Google Drive is a personal cloud storage service from Google that lets users store and synchronize digital content across computers, laptops and mobile devices, including Android-powered tablet and smartphone devices.
FreeFileSync - Download the latest FreeFileSync 10.4. FreeFileSync is a free open source data backup software that helps you synchronize files and folders on Windows, Linux and macOS.
Mega - Secure File Storage and collaboration
SyncToy - SyncToy is a free PowerToy designed by Microsoft, that provides an easy to use graphical user...