• The iPhone doesn't have one integrated trash can – instead, to reclaim space, you will need to empty the trash on your iPhone in several different apps.
• You can empty trash on your iPhone for recently deleted files in Mail, Photos, Notes, and Files.
• If you don't clear recently deleted photos, they are automatically purged after about 30 days. 
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If you're running low on storage space on your iPhone, there are a number of ways to free up space by deleting unused apps, optimizing photos, clearing the cache, and more. 

You can also save a lot of space by emptying the phone's trash, but unlike on your computer, the iPhone doesn't have one integrated recycling bin or trash can. Instead, iOS has a handful of separate trash cans, each of which much be emptied individually. 

The four most common trash cans on the iPhone are located in Mail, Photos, Notes, and Files. Here's how to empty trash for each of them. 

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How to empty trash in the Mail app on an iPhone

1. Start the Mail app. 

2. On the Mailboxes page, tap "All Trash."

3. Tap "Edit."

4. Tap "Delete All."

This empties all of the trash cans in your various email accounts with a single click. If you prefer, you can tap an account on the Mailboxes page, tap "Trash," and only empty trash associated with a specific account. 

How to empty trash in the Photos app on an iPhone

1. Start the Photos app. 

2. Tap "Albums" in the row of icons at the bottom of the screen. 

3. Scroll down to the bottom of the Albums page and tap "Recently Deleted" in the Other Albums section.

4. Tap "Select."

5. Tap "Delete All."

The Photos app automatically deletes files in this folder after about 30 days, so if you don't manually delete anything here, eventually it gets removed on its own.