The majority of art these days is created digitally. The old way of saving your art was to place it somewhere safe. The same goes for your digital art. I use this method and it has kept me secure throughout years of computer use/hard disc failures.
Buy a new drive. Use it to clone your hard drive yearly, place the newly bought drive in its stead and place the older drive in a secure box preferably in safety in another building. You will benefit from years of backups and the latest in drive technology space/speed and it will only cost £60-£70 or so per year. If you are ever in trouble you can take the backup drive and put it back in your system and it will boot immediately and you'll have access to all your old data in minutes. Your machine will often end up faster too as new drive technologies improve. If you have a laptop with a single drive this method will backup everything, the o/s, programs, data, everything - all safe.
In addition to this, buy some 32gb USB sticks and copy your data to one of these each and every month. Ensure the USB sticks have holes so they can hang from hooks somewhere useful, so you don't forget. Mark them month 1-12, don't re-use them until the year ends. 32gb is normally enough for the majority of computer users. You may be able to buy smaller, cheaper sticks depending upon what you do, how much data you have, possibly 8/16gb will do. They are so cheap nowadays. You obviously only need to backup your data and not your programs.
Buy four others, mark them 1-4 and do the same weekly.
If you are really keen on backups and you can be relied upon to take backups then you could do the same daily on sticks marked 1-7 but for most that would be overkill.
This next bit is important - Never trust Microsoft and never store anything under the windows profile (my documents &c) - as a profile corruption can occur just due to high usage - and you can lose the lot all in one go. Trust me - it happens and when it happens to you, you will be devastated. Instead, create a single folder in the root of your drive with your chosen name and put everything there. You can move your Firefox profile folder to your chosen location and the same for your email program (thunderbird &c) - in that way it will all be backed up.
I use dropbox to synchronise my most important folder where all the creative work I make goes. 5gb is the current free size and it is enough to give me a daily/hourly copy. Warning! It is a mere copy however and not a backup so it cannot be relied upon to resolve corruption/overwriting. Explanation: As Dropbox syncs continuously your online data is vulnerable to corruption or deletion. Ie. if you corrupt the version locally on your hard drive it moves the corrupted version up to the web corrupting that copy too. Most don't realise that having one or two copies synched to dropbox or google drive is basically useless as a backup for your valuable data.
Note: Google drive is incredibly slow so avoid it. Their software will over-consume CPU and slow your PC to a crawl. Onedrive is a Microsoft offering and cannot be relied upon - proven - they will change the Terms of service, reduce your capacity arbitrarily, scan your data for useful information. Amazon is more or less the same and on top of that the service will periodically go offline. Check the web for verification of these facts, don't ask me! Use cloud storage at your own risk and remember how often you are without a mobile signal... even in the UK.
Note: Don't put your photos on your hard drive, keep them on SDcards/ USB sticks separately. they are much more reliable than hard drives. Print the best professionally on 100 year ink/100 year paper and put them in an album. This last act is the only way to preserve your photos for future generations. All hard drives will fail and all family photos will be lost if stored this way - it is just a matter of time. You'd be amazed how many collections of family photos have been lost because they were stored on a drive. Personal experience - Gone forever.
This is a relatively simple method of backing up your data. Recommended and taken up by many. Saved lots of data, many times. Best of luck.