If you’ve been waiting for an insanely fast solid state drive for use in RAW 4K or 3D video editing—and let’s be honest, who hasn’t?—LaCie’s Little Big Disk Thunderbolt 2 ($1,299) is ready to blaze through your files and wallet at the same time. Palm-sized, beautiful, and promising real-world 1,375MB/second transfer speeds, the drive contains dual RAID 0/1 PCIe SSDs, cooled by a larger but quieter fan than…