Rsync Backup Related

Currently I am using rsync to backup directory and mysqldump sql file on both external and internal backup drive

Now the directory has around 100,000 files that hardly change. Only thing that happens in that directory is either the old files are deleted or new files are added. All of them image

Due to some reason when i rsync using any of the two commands below, it transfer each and every file again rather then transferring the new or updated files.

Here is what i am currently using

rsync -avH /old/path /destination/path (this is for internal backup drive)

or

rsync -avz -e ssh /old/path username@username.remoteaddress:/destination/path

why all my files in the directory all uploaded again