Uploading-and-downloading-data.md

@@ -75,10 +75,10 @@ When users have previously downloaded data from PEP, they can use the `--update`
 /app/pepcli pull -o ~/analyze/todays-data --update
 ```
 
-To prevent data loss, the `pepcli pull` command will be aborted if
+To prevent data loss, the `pepcli pull` command will be aborted
 
-- the output directory already exists when performing a regular (initial) download.
-- file contents have been altered when performing an update.
+- when performing a regular (initial) download: if the output directory already exists.
+- when performing an update: if directory and/or file contents have been altered after the initial download.
 
 Use the `--force` switch to have the command (discard/overwrite local data and) proceed anyway.