Bill wrote:
[snip]

> 
> Well, I thought that USB flash drives would solve your problem.
> They're not quite data crystals, but they are close in operation.
> Problem is, the largest capacity I found is only 16MB, so they
> probably wouldn't be a practical solution for you.

Keep looking.  This USB flash drive gives 8 GB
http://www.amazon.com/448-BIT-Secure-Encryption-Lifetime-Warranty/dp/B000FQ86DW/ref=sr_1_22/103-1978177-6847040?ie=UTF8&s=pc&qid=1175195294&sr=1-22>

There are cheaper ones.

Andrew Swallow
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