The NAS is really not intended to be used connected directly to a single system, as if it were an external drive.
If you're not going to connect it to a network with a DHCP server that will issue both the NAS and the laptop with ip addresses, you will need to set static addresses - the NAS will default to 192.168.0.32 and the laptop will probably get an APIPA address in the 169.254.x.x range, and will be unable to connect to the NAS - EasySearch will find it because of the broadcast technology used, but after that, it's not going to work.
Either connect them both to a network with a DHCP server - or set a static address on the laptop - 192.168.0.2 should work.