In a mature market where the upper limit for portable hard disk drives seems to be 4TB – we tested one of this size back in 2015! – there’s little need or desire to innovate, with pricing becoming the sole metric these drives are judged on.Īgainst the likes of the Seagate Expansion, which costs 25% less, the lure of a three-year warranty and a Type-C connector might be diminished. With a three-year warranty by default, a useful set of utilities, a reasonable retail price and decent performance, the WD My Passport Ultra 4TB (2019) marginally improves on an already good product.