Hi,
Migrating a website to PrestaShop is quite simple.
You just have to :
- copy the files located in a folder X and paste them in a folder Y.
- change the connection parameters to the database located in the parameters.php file
- change the address of the site in the database : ps_shop_url
- if ever it is a local copy, then remove the SSL in the database : ps_ssl_enabled
- delete the htaccess file
And here is the site migrated.
Then for the images, the best is to use PrestaShop variables in the sources like for example : {$urls.base_url}