In this post, you’ll learn more about the Error FVE_E_TOO_SMALL – 0x80310011 that is returned when working with the COM-based APIs in Win32
Win32 COM Error
FVE_E_TOO_SMALL – 0x80310011
Win32 COM Error Error Description
The drive cannot be encrypted because it does not have enough free space. Delete any unnecessary data on the drive to create additional free space and then try again.