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.
CheatKeys - View Windows keyboard shortcuts in the current application.
Dropbox - Online Sync and File Sharing
KeyCue - Menu shortcuts are supposed to provide quick access to frequently used menu commands.
Google Drive - Access and sync your files anywhere
cheat.sh - The only cheat sheet you need Unified access to the best community driven documentation
Mega - Secure File Storage and collaboration