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.
Picross puzzle generator - Picross game and puzzle generator implemented in JavaScript.
Dropbox - Online Sync and File Sharing
Ordinary Puzzles - A minimalistic puzzle game inspired by Picross and Sudoku.
Google Drive - Access and sync your files anywhere
Hungry Cat Picross - Join the adorable Hungry Cat on a vibrant Picross puzzle journey.
Mega - Secure File Storage and collaboration