1. Click on the setting,

2. Select the Apple ID name

3. Click on "iCloud".

4.Next, select iCloud Backup.

5.Select the switch  to turn on iCloud Backup,


6. and click on "Back up Now”.

7. Open the browser on computer and visit iCloud.com,

8. Login through your Apple ID and Password, now here you can see your data.

*Clicking through CTRL, you can select multiple photos at a time to download.

More details..