I have a 4TB My Book connected to my EX2 as well. When you copy between EX2 and the My Book (in either direction), it matters on which computer you issue the copy command. IF you issue copy command on the EX2 itself (EX2 is a computer) after logging into it via SSH, then the copy will be blazingly fast, utilizing the USB 3 connection to it. But on the other hand if you open the source folder on My Book and the target folder on the EX2, on a Windows laptop and then copy the files using Windows, then you are basically issuing the copy command on the Windows computer. In that case, you are routing the data from My Book to your Windows computer and then to the EX2, essentially adding an unnecessary round-trip to your computer’s network card before it goes to it’s destination…because the Windows computer is doing the data routing. And it gets worse when your Windows (or Mac) computer that’s serving as this intermediary, is only connected to the network via a wireless connection, and not a wired connection. The speed you posted (~ 4MBps) is very typical speed of Windows computer on a wifi network connected on an N (802.11n) router. You can get much better speeds anytime you connect your computer to the network using a wired connection (CAT 5/6 ethernet cable…preferably CAT 6). You will get the best speed when you don’t do this copy operation in Windows, but instead login to the EX2 via SSH, navigate to the share you are copying (usually they are in a path like /mnt/HD/HD_a2/<your_share_folder_name>) and then copy from the path on the USB depending on which USB port you connected the drive to, it will either be /mnt/USB/USB1_c1 or /mnt/USB/USB2_b1. Of course, you need to be comfy with simple Linux/Unix commands like copy command…if you aren’t Google is your best friend.
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