What is used for long term retention?

[lewislampkin]

My question is about long term retention.

It appears that you are limited in your long term retention, based upon the number of retention points you select for your data.

That is, even if you choose to have up to 999 retention points, if you're doing continuous backups, I can see that being exhausted within a matter of days, or even weeks at most, if they're slow for some reason.

What are Veeam customers using for long term retention?

[Gostev]

Periodic backup file dumps to regular disks or storage devices with hw dedupe (typically located offsite), or tape of course (but this keeps going away in favor of first approach).

You typically want to keep between 7 or 28 rollback points on disk for operational restores (depending on your requirements), this will allow you to quickly restore data that is no older than 1 month (which is what you need in 99% of cases). There is no sense to keep 999 restore points on disk.

[Gostev]

Check out this post for example, for one way of doing this:
v5 Backup to External HDD, best practices