IO Files out in the work world

Hey fellow programmers, how often do programmers out in the work force usually do IO file related programming? I was wondering because we were reviewing this subject in class and I find some reasons why it would be useful but I would just like to know from experienced coders. How often do you use this concept in your coding?
Working with files? Almost everyday: loading configurations, resources, saving data, moving stuff around...

Wrting code which interacts with files directly? Rarely. We usually have routines which do this for us, which are written once and used throughout the project.
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