It is technically possible, but no one has worked on it (only need to access the card as a raw device). Also, you really run the risk of corrupting the card in this case if dolphin were to crash or even just have a bug leading to invalid data/accesses to the card. And sadly, neither of those things are very uncommon.
I would just suggest syncing the individual files you'res interested in sharing, or making an image of the sd card and replacing sd.raw with that.
I would just suggest syncing the individual files you'res interested in sharing, or making an image of the sd card and replacing sd.raw with that.