Sony KDP-51WS550 Operating Instructions Manual page 70

Inserting and Removing a Memory Stick
If you are using a Memory Stick Duo, see "Inserting the Memory
Stick Duo" on page 70.
Inserting a
Memory Stick
Locate the Memory Stick slot and insert the Memory Stick into
the Memory Stick slot as illustrated below. Whom inserted
properly, it should slide in with little resistance and click into
place.
To remove the Memory Stick, see "Removing a Memory Stick" on
page 71.
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