<<Set your compression to 14 bit lossless compressed to shrink RAW files down to about 42mb each. Natively, uncompressed are 72+mb/image>>
Some commentators even recommend reducing to 12bit compressed if space is tight. On my Lexar 16GB x1000 card with 14bit it achieves 200 images, with 12bit it achieves 259! Further, some say that the gains made by having 14bit against 12bit will only show up in a few instances, for example in the deepest shadows.
I must admit gaining 59 images for little or no loss of resolution is a very attractive option especially if card space is at a minimum. I have a 4 Lexar 16Gb x1000 cards, but use 12bit, until I find an issue that would make me select 14bit