If you like to display only Upload Box to your users.
[upf_upload]
This shortcode can be used to upload files only. User can not view uploaded files or folder if you use this shortcode only. Admin can access Uploaded files through Backend UPF File Manager OR using other shortcodes that display Frontend File Dashboard or File Gallery. This shortcode accepts an optional attribute “id”. Pass a folder ID and the file will be uploaded to that folder if the user has upload access. If there is no id attribute, the files will be uploaded to “all files” under the my-files section of that user. example-
[upf_upload id="6024"]
Folder name: ‘Upload Only’ and ID is 6024. It is a PRE-MADE Folder Shared with ALL USERS with View+Upload access. Uploaded files can be found in Shared-with-me section within ‘Upload Only’ folder.

You must be logged in to upload/manage the files