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.
Sync.com - Sync. com offers a backup tool and a file sharing service, rolled into one.
Dropbox - Online Sync and File Sharing
Zoho WorkDrive - File storage & content collaboration tool for modern teams
Google Drive - Access and sync your files anywhere
kDrive - The most privacy-friendly online storage and file sync service. From 2 TB, hosted in Switzerland.
Mega - Secure File Storage and collaboration