Be very careful - Nvelo says you cannot install any windows update or image the drive. http://www.ocztechnologyforum.com/forum/showthread.php?99185-OCZ-synapse-cache-128Mb-Nightmare-to-get-it-to-work-I-beg-for-help

You can buy Google storage for a fraction of the price of Dropbox and use a sync client like Syncdocs. There's no real customer lock-in in this space, so its real easy to switch if a competitor offers more space.