Zip file upload

Hi, I’m, new to WordPress. I’m running a beat selling site and I am having trouble uploading a zip folder that has a number of music files inside for my customers to download after they make a purchase on my website. Once I select the .zip file that I want to upload, it starts at 1% and then times out giving me a HTTP error, something along the lines of a server reset. I’ve deactivated all the plugins, tried to upload again but that didn’t work, then I downloaded a plugin called “WP extra file types” and that doesn’t work either. Has anybody had this similar problem and if so did you find a solution.