# cd ~/annex
# cp /tmp/big_file .
# cp /tmp/debian.iso .
# git annex add .
add big_file (checksum...) ok
add debian.iso (checksum...) ok
# git commit -a -m added
When you add a file to the annex and commit it, only a symlink to
the content is committed to git. The content itself is stored in
git-annex's backend, .git/annex/
(or in direct mode the file
is left as-is).