Does my motherboard have an additional PCI.E M.2 slot or SSD slot.

[MasterAndrey]

I would like to install another NVMe M.2 SSD so I can have more data on my computer. Info:  Name:  HP  15z-ef100   Product Number: 1E868AV   Motherboard: HP 8707 (I used command promt, wmic baseboard get product,Manufacture). It is a customized unit, I changed the RAM, CPU/GPU, and SSD. RAM: 12 GB   CPU/GPU: AMD Ryzen™ 5 4500U (2.375 GHz, up to 4.0 GHz, 3 MB L2 cache, 6 cores) + AMD Radeon™ Graphics  SSD: 256 GB PCIe® NVMe™ M.2 SSD. Also can you link a video to how to open this type of laptop and how to add another SSD. Thank you!

[Huffer]

Motherboard view:

M.2 slot in red oval

Manual 

I do not have a video but start on p. 31 for picture instructions. On this model, access to storage and memory is allowed for end users without warranty issues. 

There is a space for a 2.5 inch HDD or SSD but you would have to find the caddy and cable. Happy to try to help if you wish to go that route. There is but a single M.2 slot for a gumstick type SSD so you cannot add a second one of those. 

Post back with any more questions and please accept as solution if this is the info you needed.