I just upgraded AEM from version 6.2 to Version 6.3. I see a folder called archived-versions created under crx-quickstart. Is it safe to delete the contents inside that folder?
Yes you can delete, there is no much scope for it. Actually Archive folders - contains retired digital assets. I have done similar implementation for DAM assets. There is no asset expiry or archival process in DAM. Get more info about AEM 6.3 installation here.