According to the invention, methods and devices for increasing cardiopulmonary circulation induced by chest compression and decompression when performing cardiopulmonary resuscitation are provided. The compounds are useful in vitro or in vivo for preventing or treating coagulation disorders. The method includes initiating a backup operation of data including a plurality of items, interrupting the backup operation, where interrupting occurs after a portion of the data has been completed, receiving an input to resume the backup operation, identifying a previously completed portion of the backup data, and performing a backup of a remaining uncompleted portion of the backup data.