I was looking at cases. I like the look of the official one but cannot find any information as to whether it can hold carts and usb cable. Anyway I went for the case in the link below. Looks rather good imo.
Advanced Soft Case (Nintendo Switch) www.amazon.co.uk/dp/B01N4P0LNT/ref=cm_sw_r_cp_api_FO0Hyb7R7SKRK