Accessing on line storage

I have purchased and downloaded Norton 360 version 2 with 2Gb’s of on line storage. I set up the product and backed up, immediately using the 2Gbs. Shortly afterwards the hard drive crashed and is not repairable. So, I am glad of my on line storage but the problem is the system crashed before I learnt how to access this. What information do I need to find my data? Can I do it just with my e-mail address as this could be all I have?  Do I have to use a computer with Norton on it or can I use anothe computer with McAfee on it?