Why Automatic Beats Remembering

Almost everyone intends to back up their files. Very few of us actually do it on a busy Tuesday evening when there is tea to make and emails to answer. That is the whole argument for automatic backups: you make one decision, set it up once, and the computer quietly does the rest while you get on with your life.

An external drive is still the most dependable option for most households. It is inexpensive, it copies quickly over a USB connection, and it does not depend on your broadband working or on anyone else's servers staying online. The trick is to arrange things so the backup happens without you having to remember, and so that you can actually get your files back when something goes wrong.

The routine below takes about half an hour to set up. After that it asks almost nothing of you beyond plugging in a cable now and then.

Pick the Right Drive and Connect It Properly

Buy a drive that is at least twice the size of everything you currently store. If your Documents, Pictures, Videos and Desktop folders add up to 300GB, a 1TB drive gives you room to grow and space for several older versions of your files. Desktop drives that sit on a shelf and get their power from the USB cable are perfectly adequate; a portable drive is better if you plan to keep it somewhere else in the house.

• Format matters. Check whether your computer wants the drive formatted as NTFS, exFAT or APFS before you start. Your backup software will usually tell you, and it can often reformat the drive for you.
• Use a rear USB port on a desktop PC where possible. Front ports get knocked, and a backup that stops halfway because a cable shifted is worse than no backup at all.
• Give the drive a clear name such as "Backup 2025" so you never confuse it with a memory stick full of holiday photos.
• Do not use the same drive for everyday storage. If you work directly from the backup drive, you lose the protection it was meant to provide.

Set a Schedule You Will Actually Keep

Daily is the right answer for most people, and the backup should run when the computer is on but you are not using it. Windows Backup and File History, and Time Machine on a Mac, will both let you choose an interval and then get out of the way. If your machine came with third-party backup software, the settings live in a similar place: look for a schedule or frequency option and set it to daily or, at a push, every few hours.

A few settings are worth checking while you are in there:

• Include your real working folders. Documents, Pictures, Desktop and any project folders you keep elsewhere. It is easy to back up a tidy folder you never use and miss the one with everything in it.
• Decide about large media. Films and music libraries can be excluded to keep backups quick, provided you have another copy of them somewhere.
• Set backups to run when the machine is idle so a long copy does not slow your evening's work to a crawl.
• Turn on notifications. You want a quiet warning if a backup fails, not silence for six months.

If your computer is switched off a lot, a schedule tied to "when the drive is connected" rather than a fixed time works better. The backup starts the moment you plug in.

Test a Restore Before You Need It

This is the step nearly everybody skips, and it is the one that matters most. An untested backup is a hopeful guess. Testing is quick and it will teach you how the software behaves under pressure.

• Create a small test folder with a couple of documents inside it.
• Run a backup manually and wait for it to finish.
• Delete the folder from your computer, empty the wastebasket or recycle bin, then restore the folder from the backup.
• Open one of the restored documents and confirm the contents are what you expect.

If that works, you know three things: the drive is being written to, the software can find your files, and you can drive the restore screen without panicking. Repeat the test every few months, and always after changing computers or backup software.

Keep the Drive Disconnected When It Is Not Needed

A permanently attached backup drive shares the fate of the computer it is plugged into. A power surge, a spilled drink, a stolen laptop bag or a ransomware attack can take out both at once. Unplugging the drive between backups removes that shared risk almost entirely.

The practical version of this is simple. Leave the drive connected long enough for the scheduled backup to complete, then disconnect it safely and put it somewhere dry, away from direct sun and away from the router. If you can, keep it in a different room from the computer. For anything genuinely irreplaceable, consider a second drive kept elsewhere — at a relative's house or in a desk drawer at work — and swap the two over every month or so.

A Short Monthly Routine

Automatic backups need very little attention, but they are not entirely maintenance-free. Once a month, spend five minutes on the following and you will stay out of trouble.

• Open the backup software and check the date of the last successful backup.
• Look at how much free space is left on the drive. A full drive stops backing up, often without much fuss.
• Run a manual backup and watch it finish, rather than assuming it did.
• Restore one file from the backup as a spot check.
• Check that the drive is not getting unusually hot or making new clicking noises. Drives do wear out, and a replacement costs far less than the files on it.

Do that and you will have something genuinely valuable: recent copies of your work that appear without effort, and the confidence that you can get them back on the day you need to.