Unable to delete or copy system folder from completed Butterfly simulation

I am trying to move the butterfly simulation folder after completion to a server and managed to do it first few times to make space on my local storage.

Recently, I have been unable to copy/paste the Butterfly/system folder from the local directory to another directory on the server. Also been unable to delete the copied system folder I have sitting in the same directory from my previous copy/paste. It gets deleted and comes back. Every other folder works fine.
I have tried copy/ paste to a different directory both on my local storage and the server but facing the same issue.

Folder in question below

Contents of system folder