What are some alternatives?
Dropbox - Online Sync and File Sharing
Syncthing - Syncthing replaces proprietary sync and cloud services with something open, trustworthy and...
ownCloud - ownCloud is an open source project enabling businesses to host their own cloud storage while maintaining regulatory and compliance needs.
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.
Synology Cloud Station - Network Attached Storage (NAS) for home and business, Synology is dedicated to provide DiskStation NAS that offers RAID storage, storage for virtualization, backup, NVR, and mobile app support.
Mega - Secure File Storage and collaboration