Solved! Slot of laptop

Solution
The hard disk is an internal piece of equipment and it connect to SATA and Power ports directly.

From what I can see, your model only has one hard drive but it also has a SdCard slot on the outside, along with USB 3.0 which is far faster than 2.0
The hard disk is an internal piece of equipment and it connect to SATA and Power ports directly.

From what I can see, your model only has one hard drive but it also has a SdCard slot on the outside, along with USB 3.0 which is far faster than 2.0
 
Solution