If you see here, it says maximum memory is 16GB: https://www.acer.com/datasheets/2017/4876/SP513-52N/NX.GR7AA.006.html
According to some videos I've seen, if the RAM is serviceable it must be behind the motherboard. This site says it's soldered: https://www.ultrabookreview.com/17701-acer-spin-5-sp513-52n-review/
My question is does this model have replaceable memory, whether or not it is intended as "user-replaceable", and is it one stick of 8GB or two sticks of 4GB? After the warranty is over I might attempt upgrading the RAM, but I need to know if it is one stick or two sticks.