Upgrading to the latest version in General Support Posted 5 hours ago Frankly, you need to fully understand what your various .htaccess files are doing, and why. They cannot be treated as sacred totems that are kept without change, or something to be discarded without a second thought. If you don't understand what parts of which ones to keep, find someone (and pay them) to help you. Quote As our site is busy how can we display a page/message to inform of website down during transfer? I think there is an add-on or two to show shop status (open, closed, down for repairs, etc.), but that would have to be installed into the old shop, and may not be worth the effort. You can always make an index.php file that just says "Sorry, we're down for a few minutes while we transfer to new shop software. Come back in about 15 minutes!". Save your old store's index.php file first, in case you need to come back to it (the whole site should be backed up first, for that matter). Quote With reference to urls, not sure we understand - is that what is displayed in the browser address bar or the text in the browser tab? Address bar. These are the addresses that search engines would provide to send people to your site. If they change between the old and new versions of your store (e.g., new SEO code), you will take a search results hit while your site is reindexed, and for some time after (unless your old URLs are 301 redirected to the new ones).