3.4.5 - Cloud and local storage

What cloud storage means

Cloud storage holds a user's files on remote storage systems reached through a network, usually the internet.

The data still exists on physical hardware in a data centre. “Cloud” describes the remote service and access arrangement; it does not mean data is stored in the air or that a new kind of storage material has replaced drives. A provider may use many storage devices and maintain copies across them.

When a learner uploads a document, data travels from the local device to the remote service. An authorised device can later download or access it. Signing in identifies the account, and sharing permissions determine who can read or change a file. Access to a local cached copy is different from reaching the current remote copy: a device can edit an offline copy and synchronise later if the service supports that.

Cloud synchronisation keeps selected copies consistent. A backup provides a recoverable copy after loss or damage. Synchronisation alone may copy an accidental deletion to other devices, so it does not automatically provide a separate recoverable history. Check whether the chosen service actually supplies versioning or restore facilities.

Cloud and local storage trade-offs

Cloud and local storage offer different kinds of access and control, so their usefulness depends on the situation.

With cloud storage, authorised users can access files from different locations and devices with a suitable connection. A team can share a common file rather than repeatedly sending separate copies. Storage capacity can often be increased through the service, and the provider maintains the remote hardware. A remote recoverable backup can protect against the loss of the user's local device.