Translations:Burn an ISO File/86/en
After you've inserted your USB drive, identify it using diskutil:
user $ diskutil list
/dev/disk0 (internal, physical): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *1.0 TB disk0 1: EFI EFI 209.7 MB disk0s1 2: Apple_APFS Container disk1 1000.0 GB disk0s2 /dev/disk3 (external, physical): #: TYPE NAME SIZE IDENTIFIER 0: FDisk_partition_scheme *7.8 GB disk3 1: Windows_NTFS MYUSBDRIVE 7.8 GB disk3s1