For me it was the OS. We agreed, when I started my job, that I would use Windows but that I would eventually switch to Linux, which I did a few months in. If they wouldn’t allow it, although agreed upon, I would have left - which I did anyways, but for totally different reasons
Unsure what exactly you want to do, but this might be of help https://help.ubuntu.com/community/Partitioning/Home/Moving