Backing up your files can be a rather simple process if you have an external drive or large USB key available.  See full article for details.

Backing up your files can be a rather simple process if you have an external drive or large USB key available.

If you leverage any cloud services (Dropbox, Google Drive, Evernote, and more) the process can be even simpler.

Copy files you want to keep to Google Drive

Copy EVERYTHING from your user folder to an external hard drive