Size of Intellij folder huge

Hi, 

I have a space issue with Intellij folder which is nearly 60Gb and because I am running it on Amazon Workspaces I will run out of space soon.

The issue is in the /bin folder where there are around 20 core. files (e.g. core.6642, core.8705) which in total are 60Gb. 

Can somebody help me with some info about those files? Couldn't find anything about? They are related to the projects i have opened? Are them safe to be removed? 

Thanks a lot!