Desktop Manager & Themes

I have a question not sure this is possible.
If I download a theme to my phone doing an ota, then I back my phone up with my desktop manager is there a way for me to find the file on my computer where that is backed up and save it so that I can delete the theme from my phone and go back to my own computer to send the file/theme back to my phone at a later date.
I have some favourites that I don't want to worry about losing but I want to take off my phone for now lol because I have so many on there.
Does the question make sense?
I know obviously when I get the themes via a zip file I can save those files but I'm not sure if I can retrieve it through my desktop manager.

If anyone can help me with this I'd really appreciate it.
Thank you!

it makes sense but i don't think there is a way to do that