To back up your computer, tablet computer, digital device or smart phone is to copy some of or all of the files to either an external hard drive or the ‘cloud’. (More on the cloud tomorrow). It means you have another copy of your files stored somewhere else.
It is important to back up your computer and devices so that if something goes wrong with your device you can retrieve your files.
Words fails me as to how important backing up is. We have all lost important documents or photos but if you back up your computer or device, there is some hope that the document or the photos won’t be lost forever.
If you don’t know how to back up your device I suggest you do some searching online or better still see if you know someone who can show you how to do it, so that you can regularly back up your own files and make sure that are nice and safe.