How do I encrypt a second hard drive using BitLocker for Windows 8.1?

Hi there,
I've encrypted my 1st HDD with BitLocker, however, I can't seem to find a way to encrypt my 2nd HDD too.
More specifically, on my laptop I've got a SSD (successfully encrypted) and a HDD (yet to be encrypted).
Any ideas on how this would be achievable?
Also, what if I want to encrypt an external backup HDD?
Thanks!
Robert

Hi,
Could you check the file system of the system partition in the disk management, to see if it is NTFS or Fat32? If it is not NTFS, try to change it to NTFS.
Two partitions are required to run BitLocker because pre-startup authentication and system integrity verification must occur on a separate partition from the encrypted operating system drive. This configuration helps protect the operating system and the
information in the encrypted drive. In Windows Vista, the system drive must be 1.5 gigabytes (GB), but in Windows 7 this requirement has been reduced to 100 MB for a default installation. The system drive may also be used to store the Windows Recovery
Environment (Windows RE) and other files that may be specific to setup or upgrade programs. Computer manufacturers and enterprise customers can also store system tools or other recovery tools on this drive, which will increase the required size of the system
drive. For example, using the system drive to store Windows RE along with the BitLocker startup file will increase the size of the system drive to 300 MB. The system drive is hidden by default and is not assigned a drive letter. The system drive is created
automatically when Windows 7 is installed.
Best Regards,
Jason Zeng

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