If we erase or delete a file, we can not see it anymore, in this sense, these verbs are similar. Erase refers to the act of removing something written, usually by rubbing it. If something is erased, it is gone from existence, while if something is deleted, it means removing files from one place, however, it does exist in another, and it is recoverable. If something is erased, it does not exist anymore. Both terms are used in digital sense, while in real world, only erase can be used, as delete can refer only to deleting something digitally. Also, if something is rewritten, the former version is erased, thus, it cannot be recovered.
