Bloggers do lot of blogging using wordpress or other plat forms might save the work on line.But problem is when something us wrong and you cannot login online.Thus you lose all your content unless you have made backup say in Google Drive or DropBox.
In any casecthe best option is to have all your content in Ms word format.It then can be transferred anywhere.
So when you working with word press and you have content in Ms Word,it is not so easy copy pasting.It feels awkward.
There is a Word Press plugin called Mammoth convertet.It imports MS word files into your wordpress panel.Then when you insert it convert to normal WP posts.!
This plugin is really helpful.