This product is a very good buy in my opinion. The computer came and everything is fine. I looked and saw that the memory I have is 429 GB available and this is great. I thought that I was missing some gigs but the supplier advised me of how memory is really calculated, like this Windows uses multiples of 1024 when showing file sizes, but the SSD (and hard drives in general) use multiples of 1000. So 512 GB = 512 x 1,000,000,000 = 512,000,000,000 bytes, Windows shows you 512,000,000,000 / 1024 / 1024 = 488,281.25 MB / 1024 = 476.83 GB. Hope the info can be helpful. So I understand now. The keyboard did not work with the computer but that has been taken care of and everything is great. For the money that I spent on this unit, it is a a great buy. I have a newer that has around 1TB worth of space and I have had it for a few years now and have only used about 100GB of it. Great Buy!