There only 32GB version, no other version and only black, no other colour.
It's 32GB, but 2GB is reserved for apps, while 768MB for swap memory, etc. which left you with 27GB.
You can still use microSD up to 32GB (if you can find one, else get a 16GB, there're also different class which determine the speed)
Import Contacts from other phone?
If Nokia phone, use PC Suite, if other phone, see if you can transfer/sync the contact to your Microsoft Outlook.
The final way is copy the contacts to SIM card and then copy from SIM to your N900 contact.
i gt problem synching the phone with laptop, must hav internet then can sync using pc suite?