The DRM applied to each comic is determined by the publisher so that, for instance, while all of Image comics have DRM-Free backups available, none of the comics from DC or Marvel currently have the option to backup. Also for some publishers, the DRM-Free backup availability varies from series to series. If you’re ever unsure if a book you want to purchase has a DRM-Free option, just look for the DRM-Free icon on the Description Page. 

Go on and back that thang up.