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
Havenly - Havenly designs your room. We connect you with professional interior designers and help you get everything you need for a beautiful room, for one flat fee. No hassle, fun decorating.
Google Drive - Access and sync your files anywhere
Decorist - Beautiful online interior design for a low flat fee.
Mega - Secure File Storage and collaboration
Modsy - Interior Design You Don't Have to Imagine. See your exact room, expertly designed in 3D with actual pieces of furniture from well-known retailers that you can buy on the spot.