Samsung SGH-C414M User Manual page 16

Note: Make sure the battery is properly installed before switching on the phone.
Installing a Memory Card
Your phone also supports the use of a memory card (microSD) for data
storage of such things as data, music, pictures, and video files. This
type of memory card is designed for use with this mobile phone and
other devices.
1. Push the microSD card into the slot until it clicks (as shown).
Make sure the microSD's gold contact pins face downward and
the card is securely inserted.
Note: Your device has been tested to support up to a 16GB memory card.
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