On pack with 'download' enabled there should be a button to do just that once you have purchased the pack, if you feel there should be one but there isn't please tell us the name of the pack so we can verify and enable the button if needed: This feature is not available on all packs, although most content creators do enable the download option. If it isn't available then there should be a message telling you why, either that it is a free set for use within Roll20 or in the case of a module etc that it has been developed for use only in the VTT:
