Trying to upgrade since of October of 2016 but cursed by the error message!

creativeSpurts  Maybe you should look into making some changes in the settings of your computer.   First off if you have Windows 10, you should set your connection to Metered.  This way you will not get un expected update downloads.  If you do not have Wireless you might not be able to set a Metered Connection.  Unless you system downloaded the newest version of Windows 10 (Creators Update  1703 --  with saying 8 GB of data was used I would imagine you got this update).  I believe I seen a Metered Connection switch for Ethernet with 1703, I was unable to test this being my system was not working correctly with the Creator Update version. 

To set Metered Connection ... go to Settings in Windows 10 - Click Network & Internet - Click WiFi on left side - then click your Connection Name and set as Metered --  If you are not on WiFi Click Ethernet and it may be a Metered Connection option there.   You will have to change the setting back to Unmetered when you want to download Windows Updates.  OR you can go to Update & Security and click Download when you know you have extra data, or during the Bonus / Free Zone.

Also I advise you to make sure Windows App Updates are not set to automatically download in Windows 10.  Go to Windows Store (Click the Shopping Bag in taskbar OR search Store) at the top of Store Click the icon that looks like a person (Next to the search box)  Go to Settings.    You will have to manually download App Updates by going to Store - Click the person icon - Click Downloads and Updates.