virtualbox.org

Hello,
Primary PC: Windows 8 64bit host with Windows XP 32bit guest
Secondary PC: Windows 7 64bit host with Windows XP 32bit guest
Same basic XP Guest setup running on both host PCs
Awhile back, I transitioned from secondary PC to primary PC by exporting and then importing my XP guest VM. VirtualBox is running great on primary PC. Weekly, I copy the VM folder on my primary PC to an external hard drive as a backup. The VM on the secondary PC is now about a month out of date. I'm wondering if I can just "copy & paste" the VM folder from the primary PC to the secondary PC so I have a current version of the VM on that PC as an update/backup? Or do I need to use the "add" or "import" function in VirtualBox? Please excuse the ignorant question but I want to make sure I don't somehow destroy the functional VirtualBox installation on the secondary PC due to some stupid newbie move. Thank you for the always helpful advice.

Yes, you normally can simply "copy & paste" again from the updated version to the old version, it wil work. The only issue you might encounter are things about the difference in between your two PCs.
But you would have encountered it already before with the first move.
But as always, a backup is always best until you're sure of the procedure

Thank you Noteirak. As suggested here, when I originally moved from my secondary PC to the primary PC, I did use the export/import menu to establish the XP Guest on the primary PC. I have backups of both primary(current)/secondary(month old) VMs from last weekend and will have up-to-date backups of both VMs prior to the "copy & paste" update of the secondary PC Virtualbox XP guest VM. As you can see, what I really want to accomplish is having a backup PC ready to go if my primary PC would happen to fail. Thanks again.
OmaSteak