var/dam/download - Zip File maintenance in AEM.

If we download any assets as zip file in AEM using either AEM out of the box download asset feature or calling ' /content/dam/collections/public/I/IeX-vp9Jj2OvVBSyd58l/nameofcollection.downloadbinaries.json', using JS, they are stored in var/dam/download. we observed that they are automatically removed from var/dam/download in 24 hours. Please help us find documentation about the same that any zip files created under var/dam/download will be automatically deleted by AEM it self or do we need to specifically write a servlet or scheduler to delete it after given time to maintain the performance and not to load AEM. Also, If yes, will it automatically delete in both AEM author and publisher?

We are using AEM as Cloud.