I think they are supposed to ground the mobo out to the chassis or case but only where they attach and not on other spots of the mobo. I think the case acts as a ground plane for EMI or RF radiation. All of the mounting holes on a mobo have solder pads around them. It might be for PCB protection...
Crystal Disk Info would show you the SMART data, which would show if the SSD is going bad. I would get another cheap HDD to clone the data to and use as a boot drive while you RMA the SSD (if you can do that still). I think it's toast.