How does Git deal with binary files?

Question

• Do I have to do something to tell Git whether some files are binary (like in Subversion)? Or, can Git handle binary data automatically?
• If I change the binary

Answer 1

git add my-binary-file
git commit
git push

Will add your binary file; it is automatic.

Indeed, if you have 100 versions of your file it will store it (but compressed).

You can use submodules to make references to other repositories.