Cloud storage is an online service that stores your files on servers run by a provider and makes them available over the internet, typically through a web interface, a desktop sync folder or a mobile app. Google Drive, OneDrive, iCloud and Dropbox are common consumer examples.
Why it matters
It removes dependence on one device: if a laptop is lost or its disk fails, files synced to the cloud still exist. It also makes sharing easy, since you send a link instead of an attachment, and many services keep earlier versions of files. The trade-offs are reliance on connectivity, subscription costs and trusting a third party with your data.
Example
You save a spreadsheet into your OneDrive folder. The sync client uploads it, and your phone shows the same file a few seconds later. If you share a link with "view only" permission, a colleague can read it but cannot change it.
Common mistakes
- Treating sync as backup. Deleting or overwriting a file on one device usually propagates to all of them.
- Leaving shared links set to "anyone with the link" long after the work is done.
- Ignoring the provider's storage quota until uploads silently stop.
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