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Click on Manage Your Store
Go to the Pictures item in the side menu, the image management page will open for you, there you will see all the pictures of the products that you added while adding a new product, and pictures of the store settings as well, such as the logo and cover pictures
Here you can delete the images that you do not use, for example, and you should also take into account the disk space available to you, so please prepare the images in small sizes before uploading them to the market so as not to use up all the disk space available to you with a few images if they are of large sizes, there are sites to compress the image For small size and high quality before being uploaded to the market, such as: here