Portable hard drives that don’t require a power cable to function seem to have hit a 2TB upper storage limit for the moment. But that’s mechanical hard drives for you, which require some serious storage density breakthroughs to continue getting smaller, or bigger in the same space. SSDs on the other hand don’t face the same limitations yet, and they are catching up in terms of storage size. 
Samsung has just announced a new portable SSD called the SSD T3, which offers up to 2TB of storage space in a tiny, lightweight package. The T3 measures 74 x 58 x 10.5mm and weighs just 51 grams (business card size). Compare that to a 2TB Western Digital My Passport drive, which measures 109 x 82 x 20mm and weighs 227 grams. The carrying advantage is clear. Samsung also claims the drive is shock resistant up to 1500G, which means you can drop it 2 meters on to a hard surface and not worry about your data. Add to that transfer speeds of 450MBps and a USB 3.1 interface, as well as built-in AES 256-bit encryption, and you have a highly desirable portable drive. However, the SSD price premium still applies and will make the T3 far more expensive than the equivalent portable hard drive. Pricing has yet to be revealed, but you may remember in January 2015 Samsung launched the T1 portable SSD. That cost $600 for the largest 1TB model. We can probably expect similar pricing, but for double the storage this year. The 250GB, 500GB, and 1TB models will be cheaper, but still expensive.