diff --git a/docs/content/sftp.md b/docs/content/sftp.md
index 270e9ef94..bcd766020 100644
--- a/docs/content/sftp.md
+++ b/docs/content/sftp.md
@@ -10,13 +10,16 @@ date: "2017-02-01"
 SFTP is the [Secure (or SSH) File Transfer
 Protocol](https://en.wikipedia.org/wiki/SSH_File_Transfer_Protocol).
 
-It runs over SSH v2 and is standard with most modern SSH
-installations.
+SFTP runs over SSH v2 and is installed as standard with most modern
+SSH installations.
 
 Paths are specified as `remote:path`. If the path does not begin with
 a `/` it is relative to the home directory of the user.  An empty path
 `remote:` refers to the user's home directory.
 
+Note that some SFTP servers will need the leading `/` - Synology is a
+good example of this.
+
 Here is an example of making an SFTP configuration.  First run
 
     rclone config
@@ -173,6 +176,10 @@ which are not under your control, and to which the execution of remote commands
 is prohibited.  Set the configuration option `disable_hashcheck` to `true` to
 disable checksumming.
 
+Note that some SFTP servers (eg Synology) the paths are different for
+SSH and SFTP so the hashes can't be calculated properly.  For them
+using `disable_hashcheck` is a good idea.
+
 The only ssh agent supported under Windows is Putty's pageant.
 
 The Go SSH library disables the use of the aes128-cbc cipher by