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
ComplYant - Small business taxes are hard. We can help.
Google Drive - Access and sync your files anywhere
SaveTax - Simple & actionable tax-saving advice
Mega - Secure File Storage and collaboration
Taxfyle - Stop doing your taxes, leave it to the professionals.