I have X amount of what I'd consider entertainment bytes. These are never changed, and rarely accessed, and never for work. I could make a couple of copies on a couple of disks and feel safe.

Then I've got Y amount of work/education/social sharing/want always available bytes.

In my case, those bytes are only around 20GB. Cloudable. By I can see others who need to track through many generations of emailed back and forth documents, including attached powerpoint and other stuff. That grows huge.

So, #1, can you split it, and #2, will it still be too big (or poorly searched), or sensitive (yeah, most people forget sensitive should not go on the cloud), which means it still doesn't matter and doesn't work for you anyway.