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.
GPG Suite - Use GPG Suite to encrypt, decrypt, sign and verify files or messages.
Dropbox - Online Sync and File Sharing
GnuPG - GnuPG is a complete and free implementation of the OpenPGP standard as defined by RFC4880 (also known as PGP).
Google Drive - Access and sync your files anywhere
File Encryption XP - A program designed for protecting confidential information stored on your computer.
Mega - Secure File Storage and collaboration