The only prerequisite for Gspace is a gmail account. Just log into your gmail account – the extension picks it up automatically and is ready for interaction afterwards. You can browse your local files on the left pane and browse the gmail storage on the right. If you want to transfer files you simply mark them and click the <- or -> button to start the transfer.

The transfer pane shows the current status of all of your transfers and the status bar displays useful information such as used and available free space. It is possible to create folders as well.

Another nice feature is the ability to play multimedia files right from your gmail storage. Gspace offers a player and a photo mode for this. Just switch to either mode and you can browse and play or view those files directly in your browser.

There are currently only a few limitations that users should be aware of. Gspace has currently problems with some special characters displaying them incorrectly. It should also be noted that Google might put a temporary ban on the account if more than 1 gigabyte is transferred in 24 hours.

Some clever folks came up with an idea on how to use the empty space of your Google account. The answer: Use it as online storage. Gspace is one of those freeware tools that let you use your Google mail space as an online storage for your files.

The tool has some limitations as of now that exist because of gmail restrictions. Those are a 10 megabyte file size limitation and a limitation to some file extensions that are not considered harmful. The program page gives a good introduction to program mechanics and limitations.