Storefront Theme slowing down backend

Hi I wonder if anyone would be able to tell me why wordpress slows completely down after installing this theme along with the relevant plugins. Just trying to customise the theme is taking ages, loading a product/image which have been reduced to kb’s does not fix this? I used to have an online shop elsewhere, but decided to rather have my own shop which offered more flexibility. I am worried I wont be able to use this as I want.
Please can you advise.

Bridget

• This topic was modified 8 years, 11 months ago by Steven Stern (sterndata).