Greetings,
Welcome to the forum.
I am not a HP employee.
You have a small 16 GB caching disk drive failure. Your PC is going to run very slow.
You don't need this disk.
Disconnect this disk from the MB.
I have repaired similar systems.
Buy a one TB 2.5 inch SATA SSD to replace the factory one TB HDD if you need the storage or you rely on HP Factory Recovery media.
Otherwise you can get by with a 512 GB SATA SSD.
Clone the current Windows installation from the one TB HDD to the new SSD using Macrium Reflect Free (instructions at this Link). Or you can back up data and do a clean W10 install if you are using W10. W10 download media is available at this site (Link).
Remove the HDD. Install the SSD using the same connections used with the old HDD.
The PC should now run nicely without the 16 GB caching SSD.
Regards