First you should copy files to your XAMPP htddocs folder. And then import database sql file by phpmyadmin.
As the domains name changed so you need make sure them updated to suite your local environment.
Step 1: Change siteurl and home option with your local domain name in wp_options table
You may use sql such as:
{code type=php}
UPDATE wp_options SET option_value = 'http://localhost/bill-myblogs' WHERE wp_options.option_name LIKE 'siteurl';
UPDATE wp_options SET option_value = 'http://localhost/bill-myblogs' WHERE wp_options.option_name = LIKE 'home';
{/code}
Step 2: Change domain in wp_site table
{code type=php}
UPDATE wp_site SET domain = 'localhost/bill-myblogs' WHERE wp_site.id = 1;
{/code}
Step 3: Change siteurl in wp_sitemeta table
{code type=php}
UPDATE wp_sitemeta SET meta_value = 'http://localhost/bill-myblogs' WHERE wp_sitemeta.meta_key = 'siteurl';
{/code}
Step 4: wp_blogs: any entries in the "domains" column that have the old domain name
{code type=php}
UPDATE mur_blogs SET domain= 'localhost/bill-myblogs'
{/code}
Step 5: Change siteurl and home option in wp_#options
Each sub-site will have sets of tables that correspond to the blog_id in the wp_blogs table. You need to go to the wp#_options table, where # corresponds to the blog_id, and update the “siteurl” and “home” settings in that table.
{code type=php}
UPDATE wp_3_options SET option_value = 'http://localhost/bill-myblogs/ycfunderwaterhockey' WHERE wp_3_options.option_name LIKE 'siteurl';
UPDATE wp_3_options SET option_value = 'http://localhost/bill-myblogs/ycfunderwaterhockey' WHERE wp_3_options.option_name LIKE 'home';
{/code}
{code type=php}
UPDATE wp_6_options SET option_value = 'http://localhost/bill-myblogs/luckyslakeswimblog' WHERE wp_6_options.option_name LIKE 'siteurl';
UPDATE wp_6_options SET option_value = 'http://localhost/bill-myblogs/luckyslakeswimblog' WHERE wp_6_options.option_name LIKE 'home';
{/code}
define('DOMAIN_CURRENT_SITE', 'localhost');
define('PATH_CURRENT_SITE', '/luckyslakeswim-net/');
==============
.htaccess
RewriteEngine On
RewriteBase /luckyslakeswim-net/
RewriteRule ^index.php$ - [L]
add a trailing slash to /wp-admin
RewriteRule ^([_0-9a-zA-Z-]+/)?wp-admin$ $1wp-admin/ [R=301,L]
RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(wp-(content|admin|includes).) $2 [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(..php)$ $2 [L]
RewriteRule . index.php [L]
Posted from my blog with SteemPress : https://waytowp.com/move-a-multisite-wordpress-to-your-local-xampp/