How can i save a system image to the desktop?

So here is the deal, i just got the windows 10 message and before upgrading i want to keep a system image just in case something goes wrong.
The issue is that my system images is like 265 GB and i dont have any drive big enought for it, of course the DVD option is not really an option. So what i would like to do is keep the system image on my desktop, upload it to the internet keep it there safe and i case i need it i could borrow a hard drive from a friend or something, the thing is that i'm not able to figure out how to save the image somewhere i can choose other than the 3 options that windows provides on the control panel menu thing (DVD, USB or somewhere in the net)

-Maybe a piece of free software that allows me to do it?

thanks

Seems Windows 10 does not let users save the system image on the same volume, which I believe worked on previous versions. There's a workaround for that.

You could resize your windows partition and leave enough space for a system image on it. Format it appropriately and assign a letter to it (e.g E: ) so that windows will recognize it.

Then do the system image thing (there's a handy dandy guide here) and save it on the new partition. Then you can upload it or do whatever. After that you could delete the new partition and resize your windows partition so as to keep the old layout.

Hope that helps.

Edit:
There probably are 3rd party solutions, but in case you brick your windows installation, you should have less issues with the system image created by windows as it can be loaded during installation. Otherwise you'd have to reinstall windows, install the 3rd party application and then load the backup. But it's your call.

If you have home edition they removed the feature to let you create system iso's i was really pissed about this, you also can not save it to the system drives

clonezilla is a third party app that does images of systems.