I'm running a Linux system, so I'm asking a solution that can run on Linux, better if via terminal on a command line.
I have a laptop with an integrated SD card reader, which is connected to motherboard via USB. I just wanted to test its maximum speed, as it is surely not near to unlimited like some completely native card readers like cameras' ones. I mean, if I buy an SD faster than my reader, to use only in my PC, it would be a waste of money, right? Is my speed determined by USB maximums? Or is it a way to test its potential maximum speed without having to buy a secure digital faster than it just to see when it caps? And if it is USB standards dependent, how can I know if it is USB 2.0 or 3.0 connected?