Ah, so the only one I'll be able to see from a Windows PC is the "Data" partition for user files? Interesting...

Built in 32gb memory in the Nokia N900 should be enough for me to do anything from downloading third party apps or apps from the Ovi store and the Maemo Community apps .This device has a external memory slot to add a 16gb card to store music,song&video.This device has much more than a desktop computer.A desktop computer has 3 or 4 gbs of memory.Does anybody agree these statement?

Hi afrcblack58,

The memory you're referring to on desktops is RAM - the N900 has a lot less RAM than most desktops or laptops... the 32GB + 16GB SD card is all just storage, like a hard drive on a desktop... although IIRC the N900 uses some of it as Swap, which is sort of like RAM

That's storage, the equivalent of hard disk drives on desktop computers. At this point, desktops commonly have hundreds, or even thousands, of gigabytes of storage.

That's RAM, commonly called "memory". The N900 has 256 MB of this, plus an additional 768 MB of virtual memory.

Virtual memory, also known as swap, is part of the 32 GB storage used to hold the overflow from the 256 MB of RAM. Applications can't be run from virtual memory, they need to be swapped back into the 256 MB first, and virtual memory is slower than real RAM, but at least it avoids "Out of Memory" errors.

In short, no, the N900 isn't besting modern desktops with its specs. However, it does well for a pocketable device, and it can match desktops of not too many years past.