An external hard drive is easy. You plug it into a USB port on your computer and it will appear on your file explorer. They are typically 1tb > 3tb and cost £50>£100. The downside is that they can still fail like any hard drive and can only be easily connected to one PC at a time.
The cloud is the safest way to go, no problem with the system failing. Depending on where you get your broadband etc from, thereis a lot of free Cloud space available. Easy to use and you just save your files as you normally do. Downside, you have to be connected to the internet to use it. An upside if you share documents is that you can access the same document from any PC.
I use both plus DVD's
My important files get backed up to both external drive and cloud.
Try cloud first, it is free. Look at this site for recommendations of free cloud space.
www.moneysavingexpert.com/shopping/free-online-storage
Photos get backed up to DVD and Cloud.
Angela Rayner lashes out and calls Sunak “pint sized loser”.