Yesterday I made the case for buying a cheap external drive and keeping a real, separate copy of your important files. If you went and did that, good. You're already ahead of most people who walk into my shop.

But a drive only protects you if you use it right, and I see the same handful of mistakes over and over. None of them are dumb. They're just easy to fall into, so let me save you the trouble.

Mistake one: leaving it plugged in all the time.

I get why people do it. It's convenient to have the drive sitting there, always connected. The problem is that a drive that's always plugged in is exposed to whatever hits your computer. A power surge, a bad update, or the kind of nasty software that scrambles your files can reach the drive too, because as far as the computer is concerned, it's just another folder. The whole point of that drive is to be separate. So copy your files over, then unplug it and set it aside. A backup you can physically pull out of the machine is a backup that survives the bad day.

Now, some of you will want a drive that backs up on its own every day, and that's a fair thing to want. If you're on a Mac, Time Machine does this beautifully. Plug in a drive, turn it on, and it quietly keeps hourly and daily copies in the background, no thinking required. Windows has its own version called File History that works much the same way. If that's the setup you want, here's the trick that keeps it safe: use two drives and rotate them. Back up to one for a week or a month, then swap it out and put the other one in service, keeping the one you pulled somewhere safe and disconnected. That way you always have automatic daily backups and a separate copy that nothing on your computer can reach. You get the convenience without leaving all your eggs plugged into one basket.

Mistake two: deleting the computer copy to "free up space."

This one gets good, careful people. The drive fills up with photos, the laptop feels cramped, so the photos get moved off the computer and onto the drive to make room. It feels tidy. But now that drive is the only copy that exists. It stopped being a backup the moment you deleted the original. A backup is a second copy. If moving files means you're down to one, you've quietly undone the whole thing. Keep the original where it is, and let the drive hold a copy, not the only copy.

Mistake three: assuming the drive will last forever.

External drives are wonderful and they are also machines, which means they fail. Not often, but it happens, usually with no warning. I've had people bring me the drive that was supposed to be the safe copy, and it's the thing that died. That's not a reason to skip the drive. It's a reason not to lean your entire life on a single one.

Which brings me to the part where the cloud earns its place.

I spent yesterday pointing out what cloud sync can't do. Today I'll give it its due, because it does one thing a drive in your drawer simply can't. It's offsite and it's automatic. If your house floods or a drive dies or a laptop grows legs, the copy sitting on somebody else's servers a hundred miles away is untouched, and it got there without you remembering to do anything. That's real protection, and it covers exactly the gap a physical drive leaves open.

So this was never really cloud versus drive. They do two different jobs. The drive is your separate copy that you own and control. The cloud is your offsite copy that runs on its own. Lean on the drive for the "I want a copy nothing can reach through my computer" job, and lean on the cloud for the "my whole house could disappear and my files would be fine" job. Together they cover almost everything that can go wrong. Alone, each one leaves a door open.

If you've got both, you're in genuinely good shape, and you can stop worrying about this. If you're not sure what you've actually got running, that's the useful thing to find out today, before something forces the question. Book a quick remote checkup (https://pcrescue.me) and we'll walk through your setup together. It beats finding the gap the hard way.

Mike
PCRescue | Portland, ME