Blogger used to allow you to have a Blogger blog on your own web hosting. This means that you could have FTP capabilities, file storage, file management, etc.. Blogger FTP support was canceled on May 1 2010, and Blogger had everyone using hosted-Blogger, migrate their blogs to 'Blogger's hosting'. Blogger decided to stop supporting FTP, because only 5% of Blogger bloggers used it, and the amount of Blogger's resources devoted towards supporting FTP was significantly higher. Currently, Blogger web hosting doesn't really exist. In other words, you can't host your Blogger blog on a web hosting account of your choice. Currently, the only way to own a Blogger blog is through Blogger hosting. Blogger website files are hosted on the Blogger shared hosting servers, and you can only access them through the limited Blogger editor and admin.
If you want a website with standard web hosting i.e. File management, FTP capabilities, Database access and a plethora of website tools, you should consider the Affordable Website Package. Revamping your website is included in the package. If you wanted to revamp your Blogger website to a website that offers standard web hosting capabilities, I would recommend revamping your website and converting it to a self-hosted WordPress website.
If you have any questions about revamping your website or how you can convert your Blogger to a WordPress website, feel free to contact me. The Affordable Website Package includes customer support so you can learn to manage your WordPress website admin.