BlueProton via Amazon offers Prime members the Sony Portable Wireless Server, model no. WGC10/N, for $19.99 with free shipping. (Non-Prime members can spend $35 or more to qualify for free shipping; otherwise, shipping adds $8.32.) That's $10 under our March mention and the lowest total price we've seen. (It's a current low by $50.) Compatible with iOS and Android devices, it provides extra wireless storage via an SD card (not included).