1. A method of handling recordings in an implantable device, the method comprising: (a) prioritizing data stored in data blocks of a fixed buffer; (b) initiating a first recording in an active buffer, the first recording storing pre-event data associated from a signal set; (c) detecting a first event; (d) copying the pre-event data associated with the first event into a data block of the fixed buffer having lowest priority data as determined in (a); (e) saving post-event data associated with the first event in the data block of the fixed buffer including the pre-event data; and (f) re-prioritizing data stored in data blocks of the fixed buffer.