Exporting to camera problem - HDR-CX190

[orion310591]

I am using latest version of play memories, sony hdr-cx190, kingston 16gb class10 SDHC card...

camera is in mass storage, it says connected,

When I start playmemories, in upper left corner there is

i: PMHOME 

J:

J: is memory card, i select that, i select videos for transfering and drag them to area, and on right side i press export, to put m2ts videos to card (videos are recorded with same camera) and I get:

The destination drive cannot be found.

Check that device is connected to computer and turned on, and try again.

Importing to computer works... also i can browse card in windows explorer...

REINSTALATION DOES NOT SOLVE PROBLEM

When I open my computer, J disc is write protected.. is it normal? can camera export videos to her memory card while shown as write protected in my computer?