This is my wife's pc and actualyl we store most of our big stuff like music/photos on my pc so not sure exactly how much space she wil lneed for OS/progs and remaining data files. My question is even if the SSd is big enouh for the user data should you leave it there as understand SSD are v fast for reading and less fast for writing, which presumably is more often with data files. I may have the option to leave everythng on the SSD, but don't know if that is recommended. I imagine a music file that you just read and rarely write would load much faster if remaining on the SSD. The Outlook.pst is a file you read/write to a lot, but also one of the apps that is often slow so unsure where to put the pst file.
Previously I created a U: partition and actualyl moved the default location of user files so everything was there in including appdata folder etc. I was wondering if the files within the user profile that windows used really need to stay on the SSD to get the full benefit. I don't really understand how all these files interact with each other.