Use the tfactl purge command to delete diagnostic collections from the TFA repository that are older than a specific time.
Syntax
tfactl purge -older number[h | d]
Specify a number followed by h or d (to specify a number of hours or days, respectively) to remove files older than the specified time constraint. For example:
# tfactl purge -older 30d
The preceding command removes files older than 30 days.