The most frequently-used backup tools for iPhone/iPad/iPod must be iTunes and iCloud. In Google or Bing, you will find many topics about these two tools and lots of troubles in using them also occur on most forums, like:
No enough iCloud storage to back up.
iCloud back up now option greyed out.
iTunes backup couldn't be completed.
iTunes is stuck in backing up my iPhone.
...
As you meet with these cases, you may find an alternative to iTunes and iCloud. FonePaw iOS Data Backup & Restore can do a backup and restoring for your iPhone X/8/7 Plus.
It is able to create a complete and readable iPhone Photo Backup on your computer. It can scan out all your iPhone images, and offer you a chance to preview all found photos one by one before saving them. Usually, when you back up iDevice data via iCloud or iTunes, all contents on your iPhone, iPad and iPod touch will be backed up together. But this program works differently, it empowers you to manage and backup iPhone photos separately.
Download the trial version below and give it a try!
Backup Photos on iPhone X/8/7 Plus wihtout iTunes
Step 1. Launch FonePaw iOS Data Backup & Restore
After downloading and installing, run the program on your computer. Then connect your iPhone to PC with USB cable, later you will see the home interface of FonePaw iOS Data Backup & Restore. Please move to "iOS Data Backup".
Step 2. Do A Standard/Encrypted Backup
Before backing up pictures from iPhone, you should choose whether to encrypt your photo backup. If yes, please tick "Encrypted backup" to get started with your iPhone backup.
Step 3. Choose Photos to Save
The window will list all supported data for you, so please choose what you need. For example, choose "Photos" or you can tick "App Photos" together. Tap "Next" button to copy the data.
Step 4. Backing Up iPhone Images
In this step, you can see the progress of the backing up. If you get the following screem, you've succeeded in this backing up operation.
Note: After that, you can preview the items in the backup file. You can click "Restore iOS Data" to preview the backup details. You'll notice the photos are categorized in "Camera Roll", "Photo Stream", "Photo Library" and "App Photos", which is similar to what is in your Photo app in iPhone.
This is all about how to backup pictures from iPhone. In fact, FonePaw iOS Data Backup & Restore not only allows you to back up photos on your iDevice, but also supports to restore the files to any other iPhone or iPad. This program supports iPhone X/8/8 Plus, iPhone 7/7 Plus, iPhone 6s/6s Plus, iPhone 6/6 Plus, iPad Pro, iPad mini 4, iPad Air 2 and many other iDevices.