I have a data file with (E_R extension) that contains multiple days of data. I need to break this one large data file into separate files by date and named YYMMDD.E_R. Each file needs to contain data from 3:45am till 3:44am for the day. I've included this file but had to change the extension from .E_R to .txt.
Can someone help me get this accomplished? I'm not too knowledgable in coding so any help would be appreciated.