Thank you for all the replies / advices so far.

What I did so far was purchasing SE/30 replacement capacitors set from trag. By reading through the post in this forum, I learned replacing capacitors seems like the thing that needs to be done on these Mac. Until I see what the capacitors look like, I am not sure whether I can do the job myself or not.

I have recreated the SSW 6.0.8 floppies but I haven't tried it yet. I will give this a try again and report back how it goes.

Thank you.