diff --git a/docs/content/dropbox.md b/docs/content/dropbox.md
index 7934fe048..92596b7ef 100644
--- a/docs/content/dropbox.md
+++ b/docs/content/dropbox.md
@@ -122,3 +122,8 @@ store.  There is a full list of them in the ["Ignored Files" section
 of this document](https://www.dropbox.com/en/help/145).  Rclone will
 issue an error message `File name disallowed - not uploading` if it
 attempt to upload one of those file names, but the sync won't fail.
+
+If you have more than 10,000 files in a directory then `rclone purge
+dropbox:dir` will return the error `Failed to purge: There are too
+many files involved in this operation`.  As a work-around do an
+`rclone delete dropbix:dir` followed by an `rclone rmdir dropbox:dir`.