Why is the Fuji RAW file bigger than Sony and Olympus?

I'll check that out. If I can at least compress them on my computer it would be great. To reply to others here - IQ has very little to do with the file size. That is debatable and would depend on compression schemes (losslessly-compressing red, green and blue as contiguous parts rather than interspersed, for example, may have an effect depending on chroma noise, for example), but not by this much.

I wish FUJI officials would look at these forums and give official responses, though... They might get some good ideas too