It looks like we don't have the translated page you're looking for, but we do have other content in English and offer support in English.
Navigate to the task, folder, or project with the attachments you'd like to delete.
Right-click the attachment (located under the description field).
Select Delete. 1
It’s possible to delete files the same way from Files view, as well as from the Files dashboard widget.
Open the task, folder, or project with the attachments you'd like to delete.
Click the menu icon on the right side of the attachments section. 1
Select Delete all. 2
Click Yes 3 to confirm that you'd like to delete all attachments.
To delete multiple attachments (but not all):
Check the boxes next to attachments you want to delete.
Click Delete on the panel above the list of files.