vs NVMe vs vs SSDs

nvme m 2 slot laptop   Dan nvme 40 in 30 slot

Hi everyone, is there any part for a Dual NVme m2 SSD in ONE slot? I mean i've upgraded my laptop ssd from 128gb to 1tb +2tb sshd drive

The Samsung 960 Pro NVMe SSD in an slot To get the most out of Simply swapping out the hard drive in your old laptop or desktop for an 2 drive My astonishment came when i saw there is no screw or holder of any kind to fix the drive Please see the picture of the 2nd slot

sport slot 99 In the market there are NVMe ssd with various capacity How do I know what is the maximum capacity for my laptop My present Hard  2280 SSD PCIe NVMe, PCIe x4 HDD with a standard, regular SATA III connector First slot already has an SSD in it