Actually is this the app from the drive maker? if so it should include the trim/deallocate stuff by default so if it’s dropping off that quickly I’d buy a new one.
Thanks for your reply. I’ve had a look and apparently my windows is set up to optimise the drive weekly. It was last retrimmed three days ago and the status is ok. I guess that means 43% health is as good as it gets just now.
Given the insane cheap cost of decent SSD’s these days, I’d suggest just replacing any drive that is reporting back health stats like that. It just isn’t worth the lost data!