That's 3 to 5 cents a shot, not negligible.
Compared to what? Film? Or not taking pictures at all?
Really, for that much data, you really want to mirror a couple of TB drives, and then share with your neighbor/friend/family member far away/ like you're doing. On a similar setup.
I think the original question really boils down to, "In this day and age of hundreds of GB of personal data, how do you store it and back it up?"
I read a nice article some time ago about us becoming too attached to our data. That we were really keeping too much, and that we should gracefully let it die. Because really, when we pass away, who's going to want to dig through 1100 pictures of Mexico that we took? Nobody. They'll want the two pictures of us on our honeymoon. The picture a year that shows some kid growing up. They're not going to want to read every email we ever received - they want to see the dozen of when we fell in love.
Personally, I've got a pair of mirrored TB drives, and a chock-full 250gb drive in a box in the other room that has a copy of everything essential from about 3 months ago. My home and work computer each have copies of important work stuff, roughly up to date. If my house burns down? I'm going to lose a ton of shit, including a lot of data. But you know what? I probably don't need 99% of it. I don't need all the music and movies, D&D campaigns, papers I wrote in college, etc. When I set up these TB drives, I made a dir in my home directory that was called "old home dir". I didn't move anything out of it that I didn't need. And you know what? 95% of the stuff in it is still there after 4 months. When I did that a couple years ago, the percentage was about the same.
When it comes right down to it, our electronic data is going to be pretty much the same as our physical data from a century ago. Water leaks, mold, and sunlight destroyed most of our photos and documents. Failed HDs will destroy most of them now. But the world will go on.
Getting back onto topic, look into DropBox. Distributed copies on multiple computers, drag and drop interface, history and version control. Damn handy.
As far as the laws of mathematics refer to reality, they are not certain, and as far as they are certain, they do not refer to reality. -- Albert Einstein