no, it can't support hard disk with 3TB capacity .

I hooked one up and it was usable though it reported the drive size incorrectly. Seemed like a minor issue to me.

The traditional hard disks use MBR partition table, which supports the maximum size of 2Tb. Newest large-capacity hard disks usually use GPT partition table, which do not have the 2Tb limit.

TP-Link's USB module only supports the transitional type.

So 3Tb is not supported. It‘s too new for the TP-LINK.

bgontarek, were you only able to use 2TB of the drive? or were you able to use all of it?