SD Card with the Best Random 4k Read/Write Average

[Ajwork]

Not using it for anything in particular, but Google's failed to satiate my curiosity.

 

[Sgt_Sykes]

Memory cards aren't optimized for this kind of usage, but if you want performance, go with high-end Lexar SDXC UHS-II cards, no contest. You need a USB 3.0 reader for these things.