When I joined ISC Software I was given a new laptop and associated peripherals which included a removable 1TB SSD. As this SSD travels with me, one of the first things I did was encrypt it with BitLocker.
To encrypt a drive with BitLocker, launch Windows Explorer, right click on the drive and select Turn BitLocker On. When the BitLocker Drive Encryption window appears, click Encrypt this drive using BitLocker Drive Encryption: