iCloud and cloud storage

Auditing a full iCloud

Updated 2026-07-31 · 4 min read

iCloud fills with three things, and none of them is the documents you think of as 'your files'.

See the breakdown

System Settings → Apple ID → iCloud → Manage (or Manage Account Storage). The chart ranks consumers. Predictably:

1. Device backups — usually the winner

iPhone and iPad backups accumulate, including backups of devices you no longer own. In Manage Storage → Backups, delete the dead ones — a backup of a phone traded in two years ago protects nothing.

2. Photos

iCloud Photos stores originals for every synced device. The Recently Deleted album counts against quota for its 30-day window, so a big cleanup frees space only after it drains — or empty Recently Deleted deliberately.

3. Messages

Messages in iCloud syncs every attachment ever sent. Settings → Manage → Messages shows the total; trimming old conversations (or setting Keep Messages to 1 year on your devices) shrinks it everywhere.

4. iCloud Drive proper

Least often the problem. From the Mac, size its folders directly:

du -h -d 1 ~/Library/Mobile\ Documents/com~apple~CloudDocs 2>/dev/null | sort -hr | head

App folders (Desktop, Documents, and per-app containers) show up plainly. Large stale folders can be moved local (copy, verify, delete cloud side) to trade iCloud quota for disk.

Mail, if you use iCloud mail

Large attachments across years add up; searching mail by attachment size in Mail.app and deleting the heavy ones reclaims quota.

The order that works

Dead device backups → Recently Deleted photos → old Messages attachments → archived Drive folders. Most people clear half their quota in the first two steps without losing a thing they wanted.

Common questions

What uses the most iCloud storage typically?

Device backups and Photos. Backups of old devices are pure waste and safe to delete.

Does deleting photos free iCloud space immediately?

Only after Recently Deleted empties — 30 days, or empty it manually.