How to change workspace and build record Root Directory on Jenkins?

I figured it out.In order to save your Jenkins data on other drive you'll need to do the following:

Workspace Root Directory: E:\Jenkins\${ITEM_FULL_NAME}\workspace
Build Record Root Directory: E:\Jenkins\${ITEM_FULL_NAME}\builds

You can modify the path on the config.xml file in the default directory

<projectNamingStrategy class="jenkins.model.ProjectNamingStrategy$DefaultProjectNamingStrategy"/><workspaceDir>D:/Workspace/${ITEM_FULL_NAME}</workspaceDir><buildsDir>D:/Logs/${ITEM_ROOTDIR}/Build</buildsDir>

EDIT: Per other comments, the "Advanced..." button appears to have been removed in more recent versions of Jenkins. If your version doesn't have it, see knorx's answer.

I had the same problem, and even after finding this old pull request I still had trouble finding where to specify the Workspace Root Directory or Build Record Root Directory at the system level, versus specifying a custom workspace for each job.

To set these:

1. Navigate to Jenkins -> Manage Jenkins -> Configure System
2. Right at the top, under Home directory, click the Advanced... button:
3. Now the fields for Workspace Root Directory and Build Record Root Directory appear:
4. The information that appears if you click the help bubbles to the left of each option is very instructive. In particular (from the Workspace Root Directory help):

   This value may include the following variables:

   • ${JENKINS_HOME} — Absolute path of the Jenkins home directory
   • ${ITEM_ROOTDIR} — Absolute path of the directory where Jenkins stores the configuration and related metadata for a given job
   • ${ITEM_FULL_NAME} — The full name of a given job, which may be slash-separated, e.g. foo/bar for the job bar in folder foo

   
   The value should normally include ${ITEM_ROOTDIR} or ${ITEM_FULL_NAME}, otherwise different jobs will end up sharing the same workspace.