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.
Managify - Create & organize all your documents in a single platform.
Dropbox - Online Sync and File Sharing
Files Board - Organize & manage your documents, photos and videos
Google Drive - Access and sync your files anywhere
Crove - Automate your repetitive business documents
Mega - Secure File Storage and collaboration