Use CrashPlan to quickly back up to storage connected to your computer, such as a folder on your file system or an external hard drive directly attached via USB, Thunderbolt, Firewire, etc. CrashPlan calls this type of destination a folder.

1. Download and install CrashPlan on your computer.
   The set-up assistant will guide you through the rest of the installation. See Installing CrashPlan.
2. Launch CrashPlan by clicking the CrashPlan icon on your desktop (Windows) or in the task bar (Mac).
3. Create an account if you haven't already done so.

These instructions assume that the folder you'd like to back up to exists on your system, or the external drive you'd like to back up to is currently attached and mounted.

1. From your source computer, click the Destinations tab. Screen Details
   
2. Click the Folders page.
3. Click Select.
   
4. Select the device to which you want to backup.
5. Click Ok.
   The destination folder appears in the list of available folders.
6. Click the select the device to which you want to back up.
   
7. Click Start Backup.

Done! You are now backing up to the specified device.

Choose attached external drives in the same way you select files and folders for inclusion in your backup. When you choose an external drive, you are basically including the drive and its selected contents in your backup file selection.