Thunderbolt portable SSDs received a lot of attention at CES, but USB is still more common, ensures maximum compatibility, and is very fast. SanDisk leveraged its new 3D flash technology to produce a stylish high-speed portable storage device targeted at photographers on the go. The new Extreme Portable SSD is IP55 rated for splash and dust resistance, but the USB 3.1 Gen chip inside also gives you access to speedy transfer speeds while maximizing compatibility across platforms. The 2018 Extreme Portable SSD has a new stylish case design that is more attractive than the perforated matte finish the company used in the past.