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.
Dropbox - Online Sync and File Sharing
Zoho Creator - Zoho Creator is a low-code application development platform that helps you build a custom, mobile-ready apps to run your business.
Google Drive - Access and sync your files anywhere
Knack - Knack is the easiest, most spectacular business management software available.
Mega - Secure File Storage and collaboration
Ragic - World's most advanced online database engine. Build powerful online databases with simple Excel style online interface.