"The cloud" just means computers in someone else's building (a data center) that you use over the internet. Your Gmail, iCloud photos, OneDrive files and Netflix shows all live "in the cloud."
Where is it, actually?
There's nothing floaty about it. Companies like Microsoft, Amazon, Google and Apple run huge, secure buildings full of servers. When you save a file to OneDrive or Google Drive, it travels over the internet and is stored on their equipment, usually with copies in more than one place.
Things you probably already use
- Email: Gmail, Outlook.com and Microsoft 365 email.
- Files and photos: iCloud, OneDrive, Google Drive, Dropbox.
- Apps: Microsoft 365, Google Docs, QuickBooks Online, Zoom.
- Entertainment: Netflix, Spotify, and other streaming services.
The good and the not-so-good
| Upsides | Trade-offs |
|---|---|
| Get to your stuff from any device, anywhere. | You need an internet connection (some apps work offline and catch up later). |
| A lost or broken laptop doesn't mean lost files. | Your account becomes the key to everything, so protect it with 2FA. |
| The provider handles hardware, power and much of the security. | Monthly subscription costs add up. |
| Easy sharing and working on the same file together. | You're trusting the provider's privacy and reliability. |
The big misunderstanding: sync is not backup
OneDrive, iCloud and Google Drive mostly sync: they keep the same files matched across your devices. That's great, until you delete something or ransomware scrambles your files. Then the sync faithfully copies the mistake everywhere. These services do keep a recycle bin and some version history for a limited time, which helps, but it's not the same as a separate backup. More on that in Backups: the 3-2-1 rule.