Not Games4theWorld Base Game, can I still...?

Hello there, I am new here and I hope I didn't break any rule by asking this. If I did, please let me know.

So basically, I few days ago I downloaded The Sims 4 base game (it is not Games4theworld base game). I cracked it and it works just great. But only today I found your page and that you offer all the Expansion packs and updates.

My problem now is that I have limited internet. Only 25 GB per month and it is important for me to know in advance whether this will work or else I'll be wasting GBs. Since I have the base game (version   1.0.732.20) but not from your site, can I download your DLCs and install them following your instructions from how to install the sims 4 correctly but just skipping the base game part?

I certainly hope so and thank you in advance

No, you can't.
What you could do with your limited 25 GB a month is to download the base game only via ZLOrigin.
Thats approx 13 GB and you can at least then play with Toddlers.

I suggest that your download that base game in a different directory than that of G4TW.
In ZLOrigin, click on the word Origin (left-top)
Then Application settings
Advanced

and chnge the location under the heading Downloaded Games to f.e. C|Program Files\Zlorigin

Thank you for the quick answer but I'll pass for now. Deinstalling and again installing it so soon after I installed it for the first time is not my intention. 

Right now, I'll search the internet for other ways to update it

One day maybe when I get bored of the base game I will download it from this site

Thank you again