Sony VAIO VPCF12 Series - Manual (Page 55)

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Using Your VAIO Computer >
Using Other Modules / Memory Cards
To insert an ExpressCard module
1 Locate the ExpressCard slot.
2 Carefully slide the ExpressCard module into the slot until it clicks into place.
Do not force it into the slot.
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If the module does not go into the slot easily, remove it gently and verify you are inserting it in the proper direction.
Make sure you use the most recent driver software provided by the ExpressCard module manufacturer.