WD My Cloud EX4100

My Cloud OS 3 Personal & Network Attached Storage My Cloud EX4
1

Hi to all.
I have a WD My Cloud EX4100

I want to create a folder with name .bin (with dot in the beginning)
I have try with explorer .bin. with msdos with extract a zip file where contain the .bin folder without any success

How can i create this folder???

Thanks and regards.