The person was pointing out that some laptops only have a single SATA bay or M.2 slot for SSD, I was pointing out that if it doesn’t have a second dedicated SSD slot one might be able to use the Wifi Card slot for a second SSD. Though most laptops I’ve seen with M.2 usually have two of them on the board in addition to the Wifi slot.
The person was pointing out that some laptops only have a single SATA bay or M.2 slot for SSD, I was pointing out that if it doesn’t have a second dedicated SSD slot one might be able to use the Wifi Card slot for a second SSD. Though most laptops I’ve seen with M.2 usually have two of them on the board in addition to the Wifi slot.