CES 2014: LenovoEMC Desktop NAS Jackson Wong - Mon, 01/06/2014 - 10:02am LenovoEMC px4-400d is a desktop network attached storage device. CES 2014 is the first place to see it, so if you're not there, read on. That means excellent safety for your files and with capacity for 4 HDDs and up to 16TB in total.