drive storage optical drive storage or other computerized storage mechanisms a reversion module 1010 accesses the stored physiological data from the memory module 1008 and de processes the data such that the de processed data is substantially in the same form as original sensed data the reversion module 1010 may store the resultant data in the memory module 1008 the external transfer device 1000 may include one or more data transform modules 1012 a 1012 b 1012 c 1012 n each data transform module 1012 may be tailored for use with one or more target devices 1014 a 1014 b 1014 c 1014 n a data transform module 1012 can access the reverted physiological data in the memory module 1008 transform the physiological data to a compatible form for a particular type of target device and provide the resulting compatible data to a target device 1014 of that particular type fig1 is a schematic diagram illustrating another example of an external transfer device 1000 capable of transforming data and transferring the transformed data to another device some or all of the functionality described in the example illustrated in fig1 may exist in the example illustrated in fig1 in some examples the external transfer device 1000 may partially or fully de process physiological data using the reversion module 1010 de processed data can be provided to a first target device 1016 which can then transform the physiological data to a compatible form in an example the first target device 1016 is an imd and de processed signal data is processed in a similar manner as sensed physiological data using the first target device 39 s native signal processing function de processed data can also be provided to.