Gmail.com - Free email account from Google Inc. offers more than 2000MB 6000MB or 2GB 6GB of email space to their user. The good thing beside features pack Gmail account is their generous storage that can be converted into Online Storage & can be access anywhere as long as there is an Internet connection!! A lot of people already know about this, but I am sure some of you have not heard about it yet. Its convenient to backup/stored your files not to say when your tiny little usb drive are not along at that time!! 
OK, Its easy.. the ingredients are as below:-
1. 1 or more Gmail account
2. Internet Connection (broadband, 3G, GPRS or dial-up)
3. Mozila Firefox browser (optional)
4. Lastly…. a working computer 
1st is GSpace:- A simple firefox extension . What you need to do is install the FireFox extension, restart the firefox and keyin your Gmail username/password.. and you’re ready to go..!! Everytime you send your files to Gmail, a new email will be created and sent to your Gmail account.. Maximum file size would be 20MB as per Gmail’s maximum attachment allowed. Like alike a ftp client interface, give it a try, you will like it.
2nd is GDrive - a simple MS Windows shell extension to get connected to Gmail account. After you installation, you will notice addtional drive icon on your compute - Gdrive. It will act as your network drive to Gmail account. Drag n drop process is supported. - http://www.viksoe.dk/gmail
