Hi,
The notebook supports max 32GB of DDR4 2400MHz RAM (2x16GB)
So you can insert sizes of 4GB, 8GB or 16GB in each slot. You can get of your preferred brand. You can insert faster RAM which will run at 2400MHz
Ex
https://www.amazon.com/Crucial-DDR4-Laptop-Memory-CT8G4SFRA266/dp/B08C4VKYFG/ref=sr_1_8?dchild=1&key...
Your notebook supports M2 PCIe NVMe SSD, so something like the M2 Samsung 970 Evo would be great. or western digital SN750 or any other brand you like. There is no limit to capacity.
It will give a great boost to the everyday performance of the notebook
Service manual (page 41 RAM and page 40 SSD
http://h10032.www1.hp.com/ctg/Manual/c06523509
Hope it helps,
David
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