My WD Personal cloud is slow slow slow

I have a 3TB My Cloud. The average transfer speed from my PC HDD to My Cloud ranges from 300 to 800KiB/second. It averages around 450Kib/seconds. 

Reading or copying from My Cloud is fast. I have access to the OS. I have Unix/Linux background and understanding. I also tried WinSCP and no improvement in transfer rates.

I did restart samba services… nothing no improvement in speed. 

What can I do to improve the speed… 

Firmware Version 04.01.02-417

Cloud Access: Remote Access is ON

Current Version WDMyCloud v04.01.02-417 : Core F/W

Last Update Tuesday, December 30, 2014 11:18:43 PM

thanks

Subha

Mention how are you connected to the device? wifi, 100mbps ethernet, gigabit ethernet, direct laptop to device network, over internet?