Each backup can contain up to 1,000 recovery points, which are saved based on recovery point retention policy, i.e. how many recovery points you want to have and for how long you want to keep them. With Backup Copy jobs, you can choose to create a mirrored copy of each backup: all recovery points that are available in Backup Repository A will be copied to the Backup Repository B:

However, Backup and Backup Copy are different jobs, so you can set different retention policies for your primary VM backups and their copies in a different Backup Repository. This way, for example, you can store several daily VM backups onsite, and keep (archive) weekly, monthly, and yearly copies of VM backups in a secondary Backup Repository for long term storage

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