I started on a thought process the other day of sending a document to someone when their email was too slow. My thoughts went to a carrier pigeon, and I began to wonder how much a floppy weighs, compared to a CD. I wondered for a couple of days, and then I eventually got them out and threw on the scales. And the results are………………
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A floppy Disk weights about 16g without a label, and up to 20g with a label on it.
.
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A bare CD-R Weighs 16g and about 20g with one of those paper covers on it.
The upshot of that is that they both weigh about the same, but the floppy is probably better protected, but the CD wins over all by having much greater capacity and generally greater resistance to damage.
At least now I know.