Go to "Files" section and then click the trashbin icon to remove/delete the file. Please note this will only temporary delete the file in the document storage area.
If you wanted to permanently delete a file in the document storage, please click "Deleted Files" button to view all files that had been deleted.
Then, click the "x" button to permanently delete the file.
There will be a pop-up notification that will ask you again if you really want to delete the file and that "no data recover is possible" if you will still continue.
After you click the Yes button, you will see a notification that the "Document has been removed successfully".
For Retrieving documents, click here
FAQ:
Q: The delete option is not available on your end.
A: It means that you have a work restriction, please ask your colleague to delete the file on their end, or give you access via "Team Access" > File Permission