My stupid answer is technically correct, but just as silly...
The weight of data varies depending on the drive. My Western Digital 120GB USB drive weighs 5.47 ounces.
5.47 Ounces / 120GB / 8 bits to the byte = 5.70 pico ounces per bit
A pico ounce is 1 / 1,000,000,000 of an ounce
Current scientific research into data shows that a "1" bit and a "0" bit have equal weight. However, many of the leading scientific minds feel it is wrong to call it "weight" and should use the correct term, "mass".
I would say that it is not wise to keep loading your systems with data, because drives have been know to explode and send 1s and 0s all over the place. In fact, it would be better to shut you system off now, because it could explode an any time!!! Then go out and buy a yo-yo...
Bob Diaz