As I said: think before you write.
I never talked about RAM. It is obvious that the UX needs more RAM because of the overblown system on it.
I was talking about the memory. The N900 does have 32GB internal memory. The UX does have 30GB physical harddisk (even my 5 years old iriver does have more).
You are talking about replacing it. Sure you could do that. But you will loose your warranty and have to pay for the new harddisk. SSDs are not cheap.
Also it is funny how you use personal offenses to hide your lack of arguments.
Have a nice day!