You'll be amazed how much info you lose when someday (might be tonight) your hard disk ("temporary storage" only) decides to go south, or some malware erases your data. You'll be glad than if you have a not too old backup on your laptop, or (better even) on a CD-RW. Having written it to CD-RW you can easily copy it to the backtop.
Moreover, you can use File>Export to export recent mails to a file while which you can import to your desktop to minimize the size of the file copied.
Hope this helps.
Now my network is actually working, can I have Outlook on the laptop keep up with all the emails on the desk top? (Thankyou to all those who helped me get the network set up!)
I use desktop normally, but when I have to go away I have been dragging the pst file across to the laptop and as its now so huge (I don't want to archive, I lost some files that way) it takes ages. Is there a way the laptop can be updated without dragging ?