Going back two days some I am finding some strange files during my domain one of these is core.30695 other files will also be of same title but different code these files made my website very heavy also it takes plenty of time to load nay page, I've transformed my account info 5 occasions but no vain. Can someone assist me to what exactly are these files and who's delivering it to my domain?

Individuals files are crash logs (core dumps) and produced because of your hosting. You are able to request assistance to your hosting by mentioning individuals crash file pathes.

Individuals files are core dumps (a picture from the server memory contents) of the certain process and they're produced through the server when an unresolvable error happened inside a (most likely your) application.