One-touch backup? Pssh. That's so 2010. Lexar is revealing its second CES introduction this morning with the uncovering of its Echo MX and ZX high-speed backup devices. Both units provide 'no-touch backup' along with 128-bit AES encryption, with the MX offering an always-on capacity meter, built-in Echo backup software and speeds of up to 28MB/s (read) and 10MB/s (write). It'll play nice with both Mac and PC platforms and will ship later this quarter in capacities of 8GB, 16GB, 32GB, 64GB and 128GB (priced from $44.99 to $499.99). Taking things down a notch (from a volumetric perspective, anyway), the ZX USB
