The new Spotdox is the "missing link" for Dropbox. It allows users to use their phone to not only browse their entire Dropbox but see all the files on their computer (Mac OS X only) back at the office, home or even hotel room.

Effectively this makes a Dropbox account behave like its the size of an entire computer, says Tom Andersen, one of the founders of Spotdox.

"The free Dropbox account limits you to just a few GB of space, and while a paid account increases that limit, there is no way for Dropbox to offer multi - terabyte access," he adds. "With Spotdox, you can access your entire Mac, and all the drives on it. You can pick any of the millions of files on your MacBook to share with others, or simply add to your Dropbox. In many ways this is like having a huge multi terabyte Dropbox account."

Your computer can be accessed from your iPhone, Android device, or web browser. With no extra passwords to remember (other than your Dropbox one), usage and installation is simple, Andersen says. Spotdox supports multiple computers on the same Dropbox account.

The software also allows you to move files from your Dropbox onto your Mac, freeing up Dropbox space without having to delete files. This enables you to, for example, upload holiday photos to Dropbox from your phone, then later move them to to your Mac.

The Spotdox startup is offering the first 10,000 customers a free lifetime subscription to the service, which will eventually retail for about US$30 per year. For more info go to http://spotdox.com .