diskpart
#show the device list
list disk
 
#the output:
 
#  Datenträger ###  Status         Größe    Frei     Dyn  GPT
#  ---------------  -------------  -------  -------  ---  ---
#  Datenträger 0    Online          465 GB      0 B
#  Datenträger 1    Online          931 GB      0 B
#  Datenträger 2    Online          931 GB      0 B
#  Datenträger 3    Kein Medium        0 B      0 B
#  Datenträger 4    Kein Medium        0 B      0 B
#  Datenträger 5    Kein Medium        0 B      0 B
#  Datenträger 6    Online          931 GB      0 B
#  Datenträger 7    Online           14 GB      0 B            <<<USB Stick 16GB :(
 
#select the usb device
sel disk 7
 
#clean the usb device
clean
 
#create a new primary partition on the usb device
create partition primary
 
#select primary partition, format the partition and make this partition bootable
sel part [1]
format fs=fat32 [label="name"] [quick] [compress]
active