Do you know about RoamDrive ?
RoamDrive is a great application that permits you to upload whatever data you want in the free store space on one of your webmail accounts. You can choose between GMail (about 2700MB actually), Hotmail (non-paying up to 250MB & paying up to 2GB),MSN (paying up to 2GB) and (maybe) Yahoo! Mail soon.
It acts exactly like a Hard Disk Drive. You can simply Drag&Drop files or folder from your computer in the application window. RoamDrive will just compress it and then upload it directly on your webmail account.
You will be able to access you file on any computer you want in the world : just install RoamDrive on it and then connect to your account.
The difference between RoamDrive and GMail Drive is that RoamDrive,allows you to upload files greater in size than 10MB, and you are not limited to file names of 40 characters maximum. It is free, there is no adware in it and the minimum system requirements you will need to meet are any version of Windows XP and the Microsoft .NET Framework version 1.1. Actually it is a beta version.
You can learn more and download it by checking their website here : RoamDrive beta.