Hey all, figured it out.
In Azure you don't pay 170 euro, you get 170 euro free credit within a month to "test" whatever you wish.
I remembered i have a OneDrive location with my previous school. They still haven't deleted it. I know the admin account credentials form a while back.
Using SharePoint PowerShell I amended my quota and now i have 5TB avaiable to backup as much as I wish.
Thank you all for the suggestions! I will consider buying external hard drive for sure!