Sry for mistake, flash description: { | | "uid" = "USB:090C1000119120002447" | | "kUSBSerialNumberString" = "0361119120002447" | | "bDeviceClass" = 0 | | "bDeviceSubClass" = 0 | | "iSerialNumber" = 3 | | "Bus Power Available" = 450 | | "Built-In" = No | | "AppleUSBAlternateServiceRegistryID" = 4295145545 | | "iProduct" = 2 | | "USB Serial Number" = "0361119120002447" | | "USB Vendor Name" = "Samsung" | | "bNumConfigurations" = 1 | | "kUSBProductString" = "Flash Drive FIT" | | "IOPowerManagement" = {"DevicePowerState"=0,"CurrentPowerState"=3,"CapabilityFlags"=65536,"MaxPowerState"=4,"DriverPowerState"=3} | | "kUSBVendorString" = "Samsung" | | "USB Product Name" = "Flash Drive FIT" | | "iManufacturer" = 1 | | "idVendor" = 2316 | | "Device Speed" = 3 | | "kUSBCurrentConfiguration" = 1 | | "idProduct" = 4096 | | "bcdDevice" = 4352 | | "non-removable" = "no" | | "USB Address" = 60 | | "sessionID" = 1761124863409195 | | "IOCFPlugInTypes" = {"9dc7b780-9ec0-11d4-a54f-000a27052861"="IOUSBHostFamily.kext/Contents/PlugIns/IOUSBLib.bundle"} | | "IOClassNameOverride" = "IOUSBDevice" | | "PortNum" = 4 | | "bDeviceProtocol" = 0 | | "locationID" = 2244608 | | "IOGeneralInterest" = "IOCommand is not serializable" | | "bcdUSB" = 784 | | "bMaxPacketSize0" = 9 | | }

It is bussiness goal to determine type of USB device. I have 2 devices, USB HDD and and USB flash stick: "uid" = "USB:105825A2374556325444" "kUSBSerialNumberString" = "575839314542374556325444" "bDeviceClass" = 0 "bDeviceSubClass" = 0 "iSerialNumber" = 3 "Bus Power Available" = 450 "Built-In" = No "AppleUSBAlternateServiceRegistryID" = 4294972871 "iProduct" = 2 "USB Serial Number" = "575839314542374556325444" "USB Vendor Name" = "Western Digital" "bNumConfigurations" = 1 "kUSBProductString" = "Elements 25A2" "IOPowerManagement" = {"DevicePowerState"=0,"CurrentPowerState"=3,"CapabilityFlags"=65536,"MaxPowerState"=4,"DriverPowerState"=3} "kUSBVendorString" = "Western Digital" "USB Product Name" = "Elements 25A2" "iManufacturer" = 1 "idVendor" = 4184 "Device Speed" = 3 "kUSBCurrentConfiguration" = 1 "idProduct" = 9634 "bcdDevice" = 4129 "non-removable" = "no" "USB Address" = 2 "sessionID" = 19316584569713 "IOCFPlugInTypes" = {"9dc7b780-9ec0-11d4-a54f-000a27052861"="IOUSBHostFamily.kext/Contents/PlugIns/IOUSBLib.bundle"} "IOClassNameOverride" = "IOUSBDevice" "PortNum" = 2 "bDeviceProtocol" = 0 "locationID" = 19005440 "IOGeneralInterest" = "IOCommand is not serializable" "bcdUSB" = 784 "bMaxPacketSize0" = 9 } { "sessionID" = 19202157925367 "idProduct" = 1574 "iManufacturer" = 1 "bDeviceClass" = 9 "bMaxPacketSize0" = 9 "bcdDevice" = 1620 "iProduct" = 2 "iSerialNumber" = 0 "bNumConfigurations" = 1 "Bus Power Available" = 450 "USB Address" = 1 "Built-In" = No "locationID" = 18874368 "bDeviceSubClass" = 0 "bcdUSB" = 784 "USB Product Name" = "USB3.1 Hub" "PortNum" = 2 "non-removable" = "no" "AppleUSBAlternateServiceRegistryID" = 4294972717 "bDeviceProtocol" = 3 "IOCFPlugInTypes" = {"9dc7b780-9ec0-11d4-a54f-000a27052861"="IOUSBHostFamily.kext/Contents/PlugIns/IOUSBLib.bundle"} "IOPowerManagement" = {"DevicePowerState"=0,"CurrentPowerState"=3,"CapabilityFlags"=65536,"MaxPowerState"=4,"DriverPowerState"=3} "kUSBCurrentConfiguration" = 1 "Device Speed" = 3 "USB Vendor Name" = "GenesysLogic" "idVendor" = 1507 "IOGeneralInterest" = "IOCommand is not serializable" "kUSBProductString" = "USB3.1 Hub" "kUSBVendorString" = "GenesysLogic" "IOClassNameOverride" = "IOUSBDevice" } I don't see any fields to distinguish that two types of devices and determine which is USB flash stick and which is USB HDD. On Linux I can use Removable attribute to determine flash drive, on Windows it is DRIVE_FIXED (for HDD) type of disk.

Thank you! You answer helped me! Now need to solve another problem with dylib :)