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
Stripe Atlas - The best way to start an internet business
Google Drive - Access and sync your files anywhere
IDC - The premier global market intelligence firm.
Mega - Secure File Storage and collaboration
Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.