While deleting a feed permanently destroys all data on an Adafruit IO feed, the process of disabling a feed permanently "archives" the data on an Adafruit IO feed. You will be able to access the feed page and its data, but not write to it.

Disabled feeds are permanently locked from editing, cannot receive any new data, and will not be included in full account downloads. Existing data may be downloaded from the feed's page.

To disable an Adafruit IO feed, navigate to your feeds page. Click the checkbox next to the feed you'd like to disable.

Click the Disable Feed button.

Read through the warning. Once you've read through it, click Confirm.

Your feed will be disabled and archived. The feed is still visible in your feeds list, but is greyed out and "locked". You can read feed data, but can no longer modify the feed or add new data.