Dec 20, 2021 · In addition, these drives are USB 3.0, which canpatible with USB 2.0 port. How fast is USB 3.0? You can get the detailed information from this post. Samsung Fit Plus. After testing by UseBenchmark, the 4k-read speed of Samsung Fit Plus is 14.3 MB/s and the 4k-write speed is 12.2 MB/s. It has a capacity of 128GB.