Format a USB drive on MacOS:
sudo diskutil eraseDisk exFAT sandisk128 /dev/disk9
Add secure erase if needed (4 being most secure AND slowest):
sudo diskutil secureErase 4 eraseDisk exFAT sandisk128 /dev/disk9
Format a USB drive on MacOS:
sudo diskutil eraseDisk exFAT sandisk128 /dev/disk9
Add secure erase if needed (4 being most secure AND slowest):
sudo diskutil secureErase 4 eraseDisk exFAT sandisk128 /dev/disk9