To copy a space you will need to
have space admin permission in the space you want to copy
have at least View, Edit and Delete permission for pages, blog posts, and attachments in the target space
to be a member of the Confluence user group added to the Copiers Group in the Copy Space - global configuration
Copying a space
To copy one space to another you must first configure a target space for the copy.
Choose Copy Space in the space tools menu
in the space tools Copy space dashboard select the Target Space for the content to be copied to using the dropdown menu.
You will need view and edit permissions for the target space.
If required you can configure the content type and the page content to be copied by configuring the copy options prior to copying the space using the Copy space button.