some time ago I bought the usb version - the main problem was inability of writing (game save positions etc.).
so I asked Peter S. if this function will be implemented in sd version. Here is his reply:
"HxC USB is read only by design - so no writing.. writing will be just ignored.. In the sd version, that is coming up in the next weeks/month,
write support is implemented.. only on Amiga, I am not sure at the moment,
because of memory contrains.. will have to wait until Jeff the developer
will release it with final specs..".
so I asked the seller - "lotharek1977" if writing to sd card is available -> no reply from him.