Hi @vasile1975
Thanks for your message!
How i can add to cart more then 100 products . if i try to add 300 is jump back on 100
By default, there is no limit on the number of products you can add to the cart. This could be related to a plugin functionality in your site.
I’d also like to better understand your site. Could you please send me a copy of your site’s System Status? You can find it via WooCommerce > Status. Select “Get system report” and then “Copy for support”. Once you’ve done that, you can paste it here in your response.
You can use https://pastebin.com/ to include the report or post it as a reply to this thread.
Once we have that information, we’ll be in a better place to help.