Things not to do with your server (will void your support and management)

Do not install a new OS over the existing one.

Do not backup your files to the main drive (or the secondary one if you are using it for hosting web sites).

Do not abuse support staff (treat them the same way you expect to be treated).

Do not do anything to your server unless you are 100% sure it will work. If you have any doubts please check with support staff to see if what you are doing is viable and allowed.