'Turn BitLocker on' missing on usb drive

 'Turn BitLocker on' missing on usb drive

'Turn BitLocker on' appears on all HD partitions, but not on USB drives. 

Solution: Insert the USB stick in question - In Disk Manager right click on the partition and Delete Volume then New Simple Volume. 

After formatting in Disk Management, you need to physically disconnect and reconnect the removable drive. Then the "Turn on Bitlocker" button appears in the Explorer context menu.