For hosting common files it's ok. Also it is on Android too do, great to transfer files between your Windows and your phone. But if you want better security you have to subscribe a monthly offer.
ownCloud - ownCloud is an open source project enabling businesses to host their own cloud storage while maintaining regulatory and compliance needs.
Dropbox - Online Sync and File Sharing
Resilio Sync - Resilient, fast and scalable file synchronization for enterprises and individuals
Google Drive - Access and sync your files anywhere
Mega - Secure File Storage and collaboration
Syncthing - Syncthing replaces proprietary sync and cloud services with something open, trustworthy and...