Yes, now that I have installed the copy of the site I can see that the reason the backup file was so large was that it included a couple of very large zip files as well as a backup of your uploads directory (/uploads_OLd), and discounting all of these the size is much more reasonable.
Note I wasn't considering the images; when making site copies we routinely exclude the image uploads directory unless explicitly testing an image-related issue.
When you upload an image to the WordPress media gallery it will automatically generate several sizes. Your theme and various plugins might also register custom sizes, which can mean that as well as the handful of sizes WP automatically creates you can end up with quite a few more. If you don't want that to happen, you would need to unregister the unwanted custom sizes, which would be the subject of another post (and isn't really Toolset issue). Note that although these images "make your site big", they are really only making it big in terms of the amount of disk space used by your server, they don't affect what's stored in the database etc.
When testing different plugins and themes and solutions you can generate a lot of post meta and comment meta and post revisions and so forth which do bloat your database. It is not easy to distinguish the good from the bad, but if you have custom fields belonging to posts which have now been deleted, then they can be readily identified and removed.
Here are a couple of links you might want to read with further info:
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Now, the issue itself is on your site the fusion builder not working when editing content templates.
So, on the copy of your site which I installed locally I found the same, including after deactivating all unnecessary plugins and switching to the parent theme.
I'm making a new copy (slimmed down version) of your site to pass to my colleagues so that they can spend the time investigating and debugging, and I'll let you know when I have some feedback.
A question from my colleague. Do you know since when the issue with not being able to edit the content templates with Fusion Builder has happened?
We have another client reporting something similar, but cannot reproduce on a clean site and are having trouble identifying what the cause is as there are no warnings or error messages anywhere that point to a problem.
If you have any info about when this started (I'm not sure you will) it may prove helpful.
I am inclined to say I was never able to use it, which would mean for about a year and a half. At that time I wasn't concerned about it because I was content using views, and they served my purposes just fine.
I am sure however that I at least tried to use it when I moved to this theme, primarily because if it was going to work better than what I was doing than great. It wasn't hindering my end goal so I wasn't concerned.
I was just contacted by a colleague going over unresolved issues and notes this was never closed, although they believe that the problem was likely fixed in Views 3.0 (which fixed a related Avada/Fusion Builder issue).
Could you please check, with the latest version of Views, if it is still an issue.
If so, I'll need to get an updated copy of your site. Let me know what you find, so I can see how to proceed.
And sorry that there hasn't been more movement on this ticket.
I have not had an opportunity to review. This hasn't been a top priority, as is hasn't been on your side. We are currently in a lock down from the corona virus and life is a bit crazy at this moment. I am hoping to review shortly, but I am frantically trying to take care of more pressing issues for my family and business. thank you.
I'll mark this as awaiting your feedback, and if you get an automated prompt to reply in a week or two you can provide a simple message just to prevent the ticket from automatically closing.