Here are the steps to select the primary card slot (see screens
in Figure 3-8):
1. Select Primary slot selection from the Shooting Menu
and scroll to the right.
2. Choose your favorite card slot from the Primary slot
selection screen. Your choices are CF card slot and SD
card slot.
3. Press the OK button to lock in your choice.
Next, we’ll look at how to set the Secondary slot function.
This lets you control what happens when you fill up the
primary card or want to separate RAW files from JPEGs.
My Recommendation: I happen to prefer the smaller SD
cards, merely because I can carry more of them and they can
be used in more Nikon cameras, like my D90 or D5000. So I
set my primary slot to SD card slot. If you upgraded from a
less costly Nikon DSLR, you may want to do the same since
you’ll probably have several SD cards. Or, you may prefer the
CF card type, especially if you use the D300S as a backup to
a D700 or D3/D3s/D3x. You don’t have to use both cards
slots if you don’t have one of the two types; the camera will
work fine with just one card. If you have Primary slot
selection set to the SD slot—with a CF card in the CF
slot—and then accidentally leave the SD card out of the
camera, the camera is smart enough to use whatever card type
it can find, in this case the CF card.
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