Martin's correct, Save As > Backup will save almost everything needed to the target location.
A couple of things to keep in mind with the backup command in Creo:
- The newly saved model becomes the active model, much like a "save as" in MS word works. So, you'll want to save your assy, then do a save as >: back up to the new folder, then close Creo and re-open the original.
- Some external references are not saved. For external copy geometry features, they will be if the source part is in memory, but others won't. Make sure you look for those.
Lastly, Creo itself doesn't keep track of links. Windchill does, but Creo itself does not. It only looks for needed parts in very specific places in a certain order. First in memory, then in the folder the parent came from, then the current working directory and lastly any defined search paths. If it can't find it then, it gives up and asks you to find it. Save as > back up should put all of the needed parts in the target folder, so everything should be found.