I love git, but most of my job use svn.
Fortunatly, you can use a local git repository, and push to a distance svn repository.
To clone from a repository on external drive
git svn clone “file:///u/ – Projet/PathToYourProject”
To have git svn AND git on the same project, first git svn clone then add your git repository
And more documentation here : https://git-scm.com/docs/git-svn
Yes, I will not explain everything, just some personal tips. Find more online!