If you don't change the pre-defined settings, all high-res data will be rolled out into a folder in the same place where your document has been saved. It will also have the same name (with the extension .SWP). As required, this folder will be automatically created or removed.
When you copy a document, you only have to copy the document and the relevant swap folder in order to always have all data at hand.
You should add more image paths in the settings only if the
document partition becomes full. These additional paths shouldn't be
placed on the same partition because they wouldn't offer more space
for data on the already full partition. If you don't want to bother
with paths, simply create your own image path for each document (e.g.
another folder with the document's name and the extension
.SWP). You can then ignore the additional search paths
.