Why is my iPhone photo library taking up 160 GB of space when I only have 3,000 photos and videos?

There could be several reasons why your iPhone photo library is taking up more space than expected. Here are some possible reasons:

1. High-resolution photos and videos: If you have taken a lot of photos and videos with a high resolution, they can take up more space than lower resolution files. For example, a 4K video can take up a lot more space than a 1080p video.

2. Live Photos: Live Photos capture a few seconds of video before and after a photo is taken, which can increase the file size of each photo. If you have a lot of Live Photos, it can add up.

3. Burst mode: If you frequently take photos in burst mode, where your iPhone takes multiple photos in quick succession, it can result in multiple copies of the same photo, which can take up more space.

4. iCloud Photo Library: If you have enabled iCloud Photo Library, your photos and videos may be stored in the cloud, but they are still downloaded to your device for local access. If you have a lot of photos and videos stored in iCloud, it can take up space on your device.

5. Cached data: Your iPhone may be storing cached data from your photo library, such as thumbnails or edited versions of photos, which can take up space over time.

To free up space, you can try deleting unwanted photos and videos, enabling iCloud Photo Library to store your photos and videos in the cloud, or using a third-party app to clean up cached data on your device.