If you are getting that warning on the Samsung drive then the drive is having problems. Since the system is new I would suggest calling Dell tech support as the drive may need to be replaced.
I have a new Inspiron 3891, and am getting hundreds of notifications a day saying the 'one of my disks is at risk (SMART event), with a link to the OPTANE management app.  When I open the app, it tells me that "your system is not OPTANE ready", and "no valid disk pairs".   Also when I look at the windows event log associated with those notifications, I get the message "Disk is starting to degrade -- new SMART event.  PM991A-NVMe Samsung 512GB.  So, is this really a hardware problem with the disk (covered under warranty) ? or is is a software problem with OPTANE?
one of your disks is at risk - SMART event