StevenUK:
Hi mc12345678
Thank you for your update. Since I upgraded to windows 10 I have been getting a few issues with some software. There is one question I would like to ask, when I upload the Responsive All Business Template into Zen Cart, will the product listing go back to zero?
The reason I ask is because I have been entering my products in different categories, and I want to try to avoid re writing them.
Thank you everyone for all your help.
Seeing as your join date is relatively recent, and the question asked above, it looks like a little explanation of the workings of the cart is necessary.
The data you've been entering: products, is stored in the database. That data is no good if it can't be presented. The template does the presentation part and is basically fully customizable to what you want the store to look like. That said, it is suggested to start with one of the pre-designed templates like you have chosen.
Because templates and template modifying "plugins" can affect how the information is presented the current structure is to keep the classic template untouched. This way when something doesn't seem to look/work right then the classic template is available to briefly test. Typically if the issue is template related then it will be evident by it working in classic but not on the problem template.
So the expectation is that there would be no affect on your entered data by installing a template. That isn't to say that it isn't possible for something to go wrong, but that's what backups are for... Make a mistake, hit the undo button... To make that process more "reliable" then setup a development version of the site where mistakes have no consequence on your profit making.
So maybe the following FAQ will help a little if nothing else a place to start and follow through to other related documents: https://www.zen-cart.com/content.php?228-understanding-the-override-system