# f3probe > Probe a block device (e.g. a flash drive or a microSD card) for counterfeit flash memory. > See also: `f3read`, `f3write`, `f3fix`. > More information: . - Probe a block device: `sudo f3probe {{path/to/block_device}}` - Use the minimum about of RAM possible: `sudo f3probe --min-memory {{path/to/block_device}}` - Time disk operations: `sudo f3probe --time-ops {{path/to/block_device}}`