@Fernando Souza , the above answers are solid. What you want to do overall is look at what jobs you should EXPECT to be there and look for anything outside that expectation. A given full will normally prune X days after its last Incremental (where X equals days of retention).
At a VERY high level, you generally should not have any jobs unaged that are older than:
Days of Retention + Days between Fulls
Now, extended Retention and Cycles will change that, but assume the following:
8 days of retention + Weekly fulls (so 7 days between Fulls) = 15 days of data at most in that copy.
With that in mind, you want to look at any jobs that are OLDER than that time period and see what the reason for not pruning states in the report and go from there.
If you can share some examples, I’ll be happy to advise!