Looking for a direction. We use a Yamaha PSR S775 for our live duo cover song shows. My husband has heavily edited styles for each song we do and they are of course saved onto a thumb drive. He's spent untold hours and weeks on developing these styles, and they are always being "tweaked". We are now going to add a drummer and a four part brass section for a bigger show that we will play occasionally. Is there a way to have all of his styles on one thumb drive for our duo show, and then have a second thumb drive with the SAME styles loaded that he can then delete /edit the drums/percussion so that the new player can simply play along (like to a click track), and remove/edit the brass parts and then save that entire show onto a second thumb drive? I tried putting his thumb drive into my Mac desktop so that I could basically try to copy the styles he needs for the 40 songs out of the myriad on the thumb drive for the bigger group, but it doesn't appear that I can do that. He is not a computer user whatsoever, and said that once he loads in a thumb drive, then edits some styles, he can't change out thumb drives and save it the edited style onto a new thumb drive - he says everything "goes away". I am not a keyboard player and trying to help figure this out. If this is possible, could someone point me in the right direction for step by step instructions so that I can read them to him and he can execute? thanks in advance.