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
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Google Drive - Access and sync your files anywhere
Sketch - Professional digital design for Mac.
Mega - Secure File Storage and collaboration
Invision - Prototyping and collaboration for design teams