In the backend select the collection where you want the document to be uploaded.
In the collection select “Display” under settings.
In display, scroll down until you see “Documents”.
Click on “(add)” to add a document.
Here you can upload your document.
Click on the cloud icon next to the box where it says “URL”.
Click on “Choose file” to select a file.
Select the file you want to upload and click on open.
Then click on upload to upload the file.
You can also give the document a name and a group to sort the documents.
In the options menu on the left click on “Store” to save the document.
Scroll up to the top and in the box “Options” select “Store” to save the changes you have made.
In the app, you have to do a reload to get the new documents.
Select the collection where you have created a new document.
Select “Documents” and your new documents should be available.