Mac storage basics · Mail, Messages and chat apps
How do I find big attachments stored in Apple Notes?
Short answer: In Notes choose View → Show Attachments Browser, then use Show in Note to find and delete big attachments. Empty Recently Deleted afterwards.
In Notes, choose View → Show Attachments Browser to see photos, scans, documents and other attachments across your notes. Select one and use Show in Note to find and delete it.
If you use iCloud for Notes, deleting removes the attachment on all your devices; deleted notes stay in Recently Deleted for a while before the space is freed.