When reclaim operations free space in files those files are not compacted to reflect the new free space. As a result the amount of free space on the deduplication store does not increase even when reclaim operations are reclaiming space – the space which is free is reserved and used for future backups
The retention policy keeps backups that are some combination defined
Weekly – the first backup after 10:00 PM on Friday
Monthly – the first backup after 10:00 PM on the last day of the month
Quarterly – the first backup after 10:00 PM on the last day of the month for March, June, September, and December
Yearly – the first backup after 10:00 PM on December 31