add more storage to my dell precision laptop

Hi @ibrahimshoki

The laptop has 1 x M.2 SSD slot and 1 x 2.5" sata HDD connector so you can upgrade the SSD and replace the HDD with an SSD with a higher capacity storage version but you cannot add an extra SSD.

You can replace the existing M.2 SSD with an M.2 2280 PCIe NVME SSD having a capacity of up to 2TB (2000GB) and the existing sata HDD with a 2.5" 7mm sata SSD having a capacity of up to 4TB (4000GB)

Here's the owner manual that may help. Go to p.41 and p.467 to view the procedure to remove/replace the SSD and the HDD respectively.