Portable SSDs are blazing fast but cumbersome to carry around… unless you have one that’s the size of SK Hynix’s tiniest external drive, which squeezes NVMe speeds into a USB thumb drive form. And if you need this kind of convenience at a discount, you’re in luck—right now during Amazon Prime Day, you can grab the 1TB SK Hynix Tube T31 portable SSD for $100 (26% off). In our review of the SK Hynix Tube T31, we gave it a 4.5-out-of-5-stars rating for its impressive speed in its compact form factor. Though bulkier than a true USB thumb drive, it still fits in your pocket. I’ve been covering tech…