I still remember a time when you couldn’t fit a big JPEG file on a 1.44MB floppy disk, so I’m occasionally flabbergasted that 512 gigabytes of storage or more can fit on something the size of the nail on my pinky finger. But indeed, this is the future, and such a MicroSD card exists. Today you can pick up a speedy one from Amazon for just $29.99, ten bucks off the standard price. This PNY “Premiere-X” card is Class 10, U3, and V30. And if you’re not a professional photographer or an obsessive follower of flash memory standards, that means that it’s rated for up to 30 megabytes per second of wr…