Strongspace
Here is a handy and inexpensive ($8/mo for 4GB) of online shared space. 
Strongspace is a secure place to gather, store, back-up and share any type of file with your co-workers, friends and family. You can upload, download and manage your files over SFTP (Secure FTP) or with any modern web browser.
Secure File Storage and Sharing – Strongspace.com