Hello @SPSDeveloper ,
Welcome to Q&A Forum!
Please follow the steps:
1.Navigation to the Document library as a site admin
2.Click Settings >> Library settings
3.On the Library Settings page, click "Permissions for this document library" link
4.On the Permissions Settings page, click "Stop Inheriting Permissions" link
5.Edit users permissions and give these users Read permission
6.When you access the Document library as a user with Read permission, the user can only read, view, and download (copy) files within the Document library
For more information about permission levels, you can see "Default Permission Levels" article.
Thanks,
Echo Du
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