This is not true for me.
The 64GB card is recognized, but not all files can be copied. Files larger than 4GB (fat32 filesize limit) won't be copied. When removing the card, putting it inside a cardreader and try it again it does work.
So to be honest: it's not a good solution, it's a workaround.

Next to that, explorer is very slow and instable. When restarting explorer through taskmanager, it's working a bit faster. I'm using Windows 8, by the way.
Only things that do work is >32GB cards and seeing/using files >4GB.
What doesn't work: fast/stable using card on PC and copying files >4GB with pc.