Sony α NEX-3N Instruction & Operation Manual page 187

Notes on using "Memory Stick Micro" media (sold separately)
• This product is compatible with "Memory Stick Micro" media ("M2"). "M2" is an
abbreviation for "Memory Stick Micro" media.
• To use a "Memory Stick Micro" media with the camera, be sure to insert the "Memory
Stick Micro" media into an "M2" Adaptor as large as Duo size. If you insert a
"Memory Stick Micro" media into the camera without an "M2" Adaptor as large as
Duo size, you might not be able to remove it from the camera.
• Do not leave the "Memory Stick Micro" media within the reach of small children.
They might accidentally swallow it.
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