Okay, you must format the HDD from the EX first... The PC will still be able to use it the HD...

Next copy your s1m file over to the HDD in the EX...

When you go to load the file from the EX, the EX may not see the file yet, so when you load toggle to your floppy drive first, then toggle back to the HD and the s1m file should be seen by the EX...

Proceed to load it into RAM.

Let me know how it works.

Peace