Migrating Metahuman characters

General question about efficiently copying Metahuman assets from one project to another.

I am finding that the migrate process is taking forever, almost half an hour for a Metahuman character with less than only 600 asset files.

Is it ever ok to simply do a finder copy on the desktop for Metahuman characters with the editor closed?
Or is there risk of corruption, missing or incorrectly updated files?