Thanks 1 and all for this tool. I have a SanDisk 2GB micro cruzer formatted NTFS SiSoftware Sandra Lite info: Benchmark Results SanDisk 2GB micro cruzer Device Index : 4922ops/minute Endurance Factor : 20.30 512bytes Files Test Read Performance : 115276ops/minute, 960.63kB/s, 6.40X Write Performance : 5308ops/minute, 44.23kB/s, 0.29X 32kB Files Test Read Performance : 26027ops/minute, 13.56MB/s, 92.54X Write Performance : 2045ops/minute, 1.07MB/s, 7.27X 256kB Files Test Read Performance : 5906ops/minute, 24.61MB/s, 167.99X Write Performance : 942ops/minute, 3.93MB/s, 26.79X 2MB Files Test Read Performance : 800ops/minute, 26.67MB/s, 182.04X Write Performance : 62ops/minute, 2.07MB/s, 14.11X 64MB Files Test Read Performance : 25ops/minute, 26.67MB/s, 182.04X Write Performance : 5ops/minute, 5.33MB/s, 36.41X 256MB Files Test Read Performance : 6ops/minute, 25.60MB/s, 174.76X Write Performance : 1ops/minute, 4.27MB/s, 29.13X This key is too slow to work correct?