To this day I'm unsure of the difference. I've used layeredfs for Sm4sh for a couple music swaps, and it works well, normal loading times and such. But recently I've seen a lot of posts about some software called SaltySD, which seems to serve the same purpose as the LayeredFS patch, just with easier setup and longer load times, and no need for NTR CFW. So I must ask: what's the benefit to SaltySD? Is there some problem with LayeredFS I've yet to see/experience, or is it just not well known that the LayeredFS patch exists?