Hi
there is something I need to understand about the hierarchy of attachments directory, normally the issues attachments exist under /attachments/key/10000/ but there are cases where the issues attachments directories exist directly under /attachments/key/ as shown below

and when I look into each one of them ( except for 10000 directory ), I find each directory is actually empty so when this case happens exactly ? as I need to find the projects that has no attachments
@Alexey Matveev I would like to hear your opinion too if you dont mind
thanks