Updated Migrate to Filer Store (markdown)

Migrate-to-Filer-Store.md

@@ -7,7 +7,7 @@ If there are already a lot of files, how to move them to the SeaweedFS the most
 > Example: `weed filer -master=localhost:9333`
 
 ### 2. Mount
-* start the "weed mount"
+* If you want to copy files via OS-provided copy command, start the "weed mount"
 > Example: `weed mount -filer=localhost:8888 -dir=/some/dir`
 
 ### 3. Copy Files