Within Outlook you can Open the Attachment and then, from there, you can Save the Attachment to a non-PST location.
I am not clear on what you mean by "If I copied a file from another folder, could I paste that to a different folder?"
Which a file from another folder?
The Attachment?
If the Attachment is already saved in another non-PST folder then you can merely use VFP's COPY FILE command to copy it elsewhere.
Good Luck,
JRB-Bldr