Sony Handycam DCR-TRV340E Operating Instructions Manual page 208

Preventing accidental erasure
– Image protection
To cancel image protection
Select OFF in step 5, then press the SEL/PUSH
EXEC dial.
Note
Formatting erases all information on the
"Memory Stick", including the protected image
data. Before formatting a "Memory Stick", check
its contents.
If the write-protect tab on the "Memory Stick"
is set to LOCK
You cannot protect images.
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