Hello,

you can upload it to Documents list (Site contents/Add new app/Document Library), in this Library is drag and drop function or new document button.

Another way is to open Sharepoint Library in File Explorer and drag and drop here

Useriøst svar - når det skal gøres automatisk

If you're using Nintex Workflow, have you tried the Copy to SharePoint action?

This workflow action is to run on the from library  

but

I needed a workflow action that is running in the to library and get a document from a fileshare 

I don't have Nintex on fileshare 

I'm sorry. You're correct, that action won't work for your situation. 

I found the following article that should help you using PowerShell:

If there is no action to Copy from file share, is it possible to upload documents with a webservice? If so, what webservice should I use?‌