To protect your data from counterfeit storage devices, you can , widely considered the industry "Gold Standard" for detecting fake SD cards and USB drives. This free, portable utility, developed by Harald Bögeholz, verifies the actual storage capacity and read/write speeds of your media by filling it with test data and reading it back to check for corruption. Key Features of H2testw 1.4 H2testw is preferred for its simplicity and reliability: H2testw 1.4 Memory testing utility for Windows