Dell Latitude E5440 SSD Hard Drive Upgrades

I just bought my Dell Latitude E5440 a month ago, and I have a spare Samsung PM851 256GB mSATA SSD for my system, when i plug in,

Your system can only have a HDDSSHDSSD The E5540 does not have an slot for a PCIe SSD That according to the Dell specs at the E5540

dell latitude 3480 m2 slot Display size · Display resolution 1366x768 pixels · Touchscreen No · Processor Core i5 · RAM 4GB · OS Windows · Hard disk 500GB · SSD No

dell latitude e5440 m2 slot Dell Latitude E5440 Compatible SSD Upgrades ; Form Factor: inch ; Software: Acronis True Image for Kingston cloning software is included with this product (