Moving data from old nas to new nas?

[davidjames1701]

I’ve had portable usb hdds plugged into my NAS for years, and have the NAS copy into them, mainly just to prevent loss of data from a nas failure, you can buy a 4-5tb model for around £100 ? I’ve just replaced my old WD DL4100 with a DS 1019+ which I’m just getting used to, and as a trial setting it up, I’ve a anker unpowered Anker 4 port usb hub plugged into the back of the 1019+, currently have two 2tb WD drives working fine.