Thoughts on going forward with Backup Copy

[tomhkr]

I have a daily Backup job runnings since about 1,5 years configured with 720 restore points.
It takes full backups every three months and incremental inbetween.

In hindsight is quite unecessary to keep daily incrementals older than 3 months.
Ideally I would like to turn down the restore points to 90 to get rid of the older incrementals. But I don't want to lose the +90 day old full backups doing this.

I understand this is accomplished with Backup Copy jobs but I'm scared that I might do a mistake and get rid of the old full backups also.

How can I keep my 90+ days old full backups but get rid of the incrementals older than 90 days?

[foggy]

Backup copy job always copies the latest VM state. You would need to copy required older fulls somewhere for further manual retention and create backup copy with the required GFS settings.

[tomhkr]

Okay great, thanks, so it would be okay if I just copied the older fulls somewhere and then set back the retention time to 90 days?

[foggy]

Yes. Then maintain the required number of these fulls manually, until your new backup copy reach that number with its GFS retention.