I had posted a similar question in the past and was told that I need to call `/2/files/list_revisions` to calculate the size of the deleted files. I collect the list of deleted items by listing each folder, but the Dropbox response does not tell whether the deleted item is a file or a folder. Since there is no way to tell which item is a file and which one is a folder, I have to call `list_revisions` in try/except to avoid failures due to calling `list_revisions` on folder. If I knew which items in the list are folders, I would have filtered them out and this would have saved several thousand API requests.