does anyone have 2cts on this topic

2 friends send usual normal emails /texts ...

but 1 of the friends does NOT DELETE...just saves the emails/texts

for what purpose it seems odd??... don't most folks "delete"?
the communication is just boring stuff of no substance...(what did you eat for lunch blah blah)..

1 friend is going through a Divorce & maybe this person is trying to get dirt..is this admissible in court