OK. That is not a real problem and your attitude is not wrong
either (don't fix what's not broken).
First determine which EXACT model you have (maybe take the
forums wiki to do the research).http://buffalo.nas-central.org/wiki/Main_Page
Don't rely on names. Buffalo "reuses" marketing names for completely
If you have the exact model, lookup the firmware which was
recent three years ago. If you can't find a firmware from three
years ago, take the most recent one.
Try to update the firmware (but do not repartition the box, or
you will loose your data). The default when updating the firmware
is WITHOUT repartitioning. So as long as you do not force a
repartition, you should be save (although I can not give you any
kind of guaranty, because I have not coded the LSUpdater myself).