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.
Sketch - Professional digital design for Mac.
Dropbox - Online Sync and File Sharing
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
Google Drive - Access and sync your files anywhere
Adobe Illustrator - Adobe Illustrator is a vector graphics editor.
Mega - Secure File Storage and collaboration