Copy files My Cloud PR4100

Hi to everyone,
I have got an new My Cloud pr4100 4 bay , 24 tb with the latest firmware, RAID 5 and I am trying to copy 164GB to Public folder from my iMac. The weird thing is it showing that I am transferring 1.85TB and takes 15 hours. I checked the folder, it is definitely 164GB size. I am doing something wrong? Could anyone help me with some advices please?
Thank you!

Hi remus_ku,

Maybe you should try contacting WD’s Technical Support about this.

To Contact WD for Technical Support

The link below will allow you to call support.