What is Usenet Retention
Retention is the amount of time a Usenet service provider keeps files saved on their servers. For example if a file is posted to our servers today, Fast Usenet has 3170 days of file retention, the posted file will be available on our network for 3170 days from the original post date.
After the 3170 day time period the file will be dropped (deleted) to make room for newly posted information. This is an example of a transitory network.