We are considering purchasing an Aspire 5 A515-51-58HD. This laptop has 4 gb of memory and Optane Memory of 16gb (which we know is not really memory. The specs say there is a memory capacity of 20 gb. We are unable to email Acer to ask about what is necessary to upgrade the 4 gb to 8 gb or larger or if it is even possible to upgrade physical memory on this model (which tells me that perhaps if Acer is this unreachable it may be a mistake to buy any Acer). If anyone has this laptop can you tell us about upgrading the memory on it. Thank you!