http://www.newegg.com/Product/Product.aspx?Item=N82E16822152185
HDDs don't cost much. That's a 1TB HDD for $55.
Don't mean to come off snobbish, but if you aren't saving up for unexpected expenses, that's your problem. $30 is a trinket compared to how bad it could be (car problems, physical injuries). If you can't afford an unexpected expense of $30 you have bigger problems than worrying about your computer IMO.
Though, admittedly, I cannot comment on the prices of hard drives in Australia.
I know, I know. But that's relative. I do save money for unexpected expenses, but a hard drive doesn't necessarily come to mind. I just usually get a pang of annoyance when people assume that what's not expensive to them is not expensive to anyone. But hey, it's not my thread. I know how much hard drives cost; I was gonna buy one myself 'cause I'm coming up on the three year mark of my current, but in my situation, it's "Should I buy this hard drive or have groceries this week?" Hopefully things will improve with my new job.
But yeah, not my thread. Also, I only really trust Seagate. I've had nothing but trouble with Hitachis, Toshibas, WDs, etc.
EDIT: This is IHaveAFatDog; I didn't realize g-ranger was logged in. I shall leave the thread now. I just poked my head in to play Middle-Class Advocate.