What computer port is this? [closed]

Solution 1:

It's used for an ethernet adapter. This range of laptop is too thin to put a full sized RJ-45 port in, so they use this port to extend out.

If you didn't receive one in the box, you should be able to buy one from Lenovo directly.

Part Name: ThinkPad Ethernet Extension Adapter Gen 2
Part Number: 4X90Q84427
Product Description: Converts the special micro Ethernet connector on supported ThinkPad computers to the standard RJ45 connector. Supports PXE boot, Mac Pass Through, and Wake-On-LAN (depends on system capability).

Here is a link to the product page:

https://www.lenovo.com/nz/en/accessories-and-monitors/cables-and-adapters/adapters/CABLE-BO-Ethernet-Extension-Adapter-2/p/4X90Q84427

As for the MicroSD card reader, it should be located under a cover at the back of the laptop, near one of the hinges:

Source