Another option would be to simply upload the text file (Notepad) version of your template to a web host. There are many web hosting services that you can avail. Some are for free while others require payments. The best free web-hosting site that I have encountered so far is Googlepages. You can upload text files and other types of files to Googlepages. These files will then be hosted in unique pages of their own -- with corresponding URL addresses, of course.
To upload the text version of your Blogger HTML template, simply follow these instructions:
Step1: Open the HTML editor of your Blogger template.
Step2: Check the “expand widget” box. Copy the entire codes using the Ctrl+A and Ctrl+C command on your keyboard.
Step3: Open a Notepad. Then, paste the codes that you have copied using the Ctrl+V command on your keyboard. Save the file using the appropriate filename (example: backup template.txt).
Step4: Open your Googlepages account. If you do not yet have an account, you must first create an account. Typically, if you have a Blogger account, you can easily open your Googlepages account. The username and password for this account are the same as the ones that you are using for your Blogger account.
Step5: Upload the Notepad file as shown in the illustration below. As you can see in the example, I have uploaded the template of my Alternate Reality blog.
Step6: After uploading the Notepad file, click the corresponding link of the uploaded file. A new page will open displaying your text file. For instance, the web page for my uploaded template is hosted at this address: Alternate Reality backup template. You can use your created page as backup template or as reference link for your blog posts. If you want to have a formatted text file, you may use MS-Word to format and save your text file. You may then upload this file.