Garbage collection runs once a day and deletes everything older than 7 days. After that the oldest files are 6.x days old. Until the next run some files will get older than 7 days, but not older than 8 days.
Garbage collection runs once a day and deletes everything older than 7 days. After that the oldest files are 6.x days old. Until the next run some files will get older than 7 days, but not older than 8 days.