dvr symbol - DirecTV

We have taped many movies and the DVR is down to 10%. We noticed a triangle with an ! inside the triangle. What does this mean?It is front of all the movies we taped 10/5 or older. I am guessing if it's a month old,it might delete them in a certain amount of time. Please help me.Thank you.

This question, "dvr symbol," is about DirecTV channels, programming, equipment, and sports.