Save your personal data on Linux with Pika Backup
Pika Backup is a lightweight free program that allows you to back up your files to any USB storage medium without worrying about configuration or complex commands.
It is a straightforward app with a simple interface. Just, Plugin your USB drive and let the Pika do the rest for you.
Pika is compatible with Gnome desktop, but it works also with KDE and XFCE.