Redmine

Hi!

Everytime I try to backup my Redmine attachments through this command:

rsync -a /path/to/redmine/files /path/to/backup/files

To be exact:

rsync -a C:\Program Files\BitNami Redmine Stack\redmine\files C:\backup

An error message will occur. It says that:
The source and destination cannot both be remote.
rsync error: syntax or usage error (code 1) at main.c(1136) [receiver=3.0.4]

What should I do?

Thanks a lot!