Cloud storage: keep useful copies, clear unneeded clutter

Cloud storage helps keep files available across devices. It also relies on storage, networking and devices whose energy use varies by service and situation. One deleted file is not a measured carbon saving. A better reason to review a cloud folder is that you can find what matters and understand what is being copied. The ECOA methodology sets out the limits of its educational estimates.

Map copies before deleting them

Pick one folder, such as photos from a family trip or drafts of a shared project. Check what is on your phone, computer, cloud account and any external backup. A file that looks duplicated may be the only full-resolution original. In the United States, many households and small teams use several devices; this is an illustrative workflow, not a statistic about their habits.

Make a list of files you want to retain. Confirm that a backup opens before removing anything. Read your provider's own sync and deletion instructions: deleting a synced file on one device may delete it elsewhere. Also check whether a shared link remains accessible after a move or rename.

Review the flow, not just the folder size

If your service supports selective sync, consider whether every device needs every large folder. If it keeps versions, check whether an old draft is still useful before changing retention settings. Do not turn off backup for irreplaceable files to chase an unmeasured emissions reduction.

When sharing a changing document, a link with suitable permissions may avoid multiple attachment versions. Review who can access it and when access should end. For people without an account or reliable access, a copy may be simpler.

Try one week

Choose one folder and note its size, the number of duplicates you verified and whether you can still restore the important files. Change one sync or sharing habit, then check it from a second device. These are workflow checks, not a verified number of kilograms saved. If access or backup becomes less reliable, undo the change.

Source on the energy used by U.S. data centers: Lawrence Berkeley National Laboratory, United States Data Center Energy Usage Report. It does not assign a carbon value to your files: Source page