@fguy 

Go to "Device Manager" and look under "Disk Drives" 

Regards,

U2

Welcome to the Dell Community  @fguy 

You can post the model number and we can tell you from that.

Or you can search your "Service Tag" and it may tell you the make and model.

https://www.dell.com/support/home/us/en/19/product-support/product/inspiron-15-5584-laptop/overview

Best regards,

U2

sorry, that's 400 BDRK

I can tell you the SKU is 400 BGRK

How do I determine the model #

Never mind I have Determined that the Manufacturer is Western Digital, with Support by Sandisk.

Thanks

It says PC SN520 NVMe WDC 256 GB

If I right click on that and go into properties, it says Manufacturer:  Standard Disk Drives