Dropbox - Online Sync and File Sharing

ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.

Box - Box offers secure content management and collaboration for individuals, teams and businesses, enabling secure file sharing and access to your files online.

ExpanDrive - ExpanDrive is a fast network drive and browser for cloud storage.

Filestash - Filestash is a modern client for FTP, SFTP, S3, WebDAV, Minio,...

FileCloud - FileCloud is an enterprise file share, sync and mobile access solution.