It has been my experience that the airlines charge excessive fees when transferring miles. It might not be fair, but we accepted their conditions when signing up for their mileage programs.
Here is what I found searching Google:
https://www.emirates.com/english/sky...ut/points.aspx
Transfer your Skywards Miles for less
If you can’t quite reach a particular reward, transfer your Skywards Miles to family or friends so you can combine them in one account and make your Miles go further. You can transfer Miles at a cost of USD 15 per 1,000 Miles and you can transfer up to a maximum of 50,000 in a year.