Why 'Operation not permitted' ?

NSUnderlyingError=0x6000003c76f0 {Error Domain=NSPOSIXErrorDomain Code=1 "Operation not permitted"}}
Operation not allowed, okay. why?
I just want to change the name of a file on an external drive.

If anyone knows the answer and especially knows the solution to eliminate this error, thank you very much for letting me know.

Thank you in advance.
Why 'Operation not permitted' ?
 
 
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