Porsche Design is known for its industrial aesthetic, often incorporating metal elements and simple, clean lines into established accessories. The new LaCie Porsche Design USB Key ($30-$50) takes the company’s theory to its logical endpoint: it’s a brushed steel stick, packing a USB 3.0 connection and your choice of 16 or 32GB of storage space. A square opening at the back end allows you to clip it to your keys. It’s not a stretch…