Looking for backup solution

Hey,

I have a PC where I have some files that need to be backed up regularly.

I was thinking of using an app that can automatically monitor the files

for changes and upload a copy to a web host every time it changes? Or

perhaps a gmail account could be used for backups? What do you think?

This needs to be something completely or mostly automated because

its for a not very computer-literate person

Thanks,

Gabriel.