EXPANSION EXPORT ERROR

I'm trying to export my expansions to my SD Card so I can use them in standalone mode. In the software I go to file and then export and then expansion. I click select all to check all the boxes and I choose my sd drive. After I click export I get a error message saying Expansion Export Error and it is not possible to export to device. Its saying my sd card is read only. I know for sure its not because I'm able to drag wav files to it from a different folder outside of MPC software. I don't know what else to do. Please help!

Try a different disk, you can always copy the expansion folder from that to the other disk