Attached is a photo of a terminal output with one of the Proxmark 3 Easy test cards. As you see, it outputs a .bin and a .json file. Additionally, this chip was also cloned with the Flipper Zero, and the Flipper emulates the card perfectly.
Here is the image of the chip type detected by the Proxmark 3. Proxmark is having difficulty identifying the exact chip type, but it a Mifare Plus 2k chip used in the access control system for my front door. Attempting to clone it before with MCT has some issues, so that’s why I purchased the Proxmark, so I can do more research in the subject. Finding an answer for this would also put me forward in the major I am currently studying, accelerating my progress towards my current degree.
Editing for adding the picture of the chip in question.
Notebook for contrast, pen for scale. The chip reads “M+2K” at the top.