
If it's your own tree, it might be easier to export GEDCOM from My Heritage and then import it to Geni at https://www.geni.com/gedcom.
Please post in https://www.geni.com/discussions/147619.
Using a GEDCOM can create very many duplicates that must be merged and for which conflicts must be solved. Using SmartCopy is much better unless there are very very few profiles in your tree that are already on Geni.