As a user, I try to drag and drop a file, from a file explorer, in a Documents folder. The action fails with the message : "The item you have dropped is not a file. If you want to upload a folder, we advise you to create a new folder first, then upload its content inside in a second time." (See attached screenshot)

The file is binary and produced by a file cutter (7z on Windows or split on Linux). You can find a sample attached.

I guess the actual use case is to split a large file into smaller pieces and to import all of them in one step using drag and drop.

Steps to reproduce:

1. Go to Document
2. Open a file explorer containing the file
3. Drag and drop the file in the Document window -> A popup windows with an error message is displayed (Reload the page if you want to reproduce a second time.)

I noticed:

1. It's ok after adding an extension to the file (whatever the extension)
2. It's ok when uploading using the 'Add' button