By using them you can prevent your iPhone from filling in by specific types of files.
iCloud Settings / Photos
First, go to a necessary menu in your iOS device Settings.
Preferences -> iCloud -> Photos
Here are our recommendations for Settings:
iCloud Photo Library
Select this option to synchronize an unlimited number of content via the cloud. All your photos and videos will be uploaded to Apple server and originals will not occupy space on a device.
P.S. The size of free storage is limited to 5 GB. You can expand it for the money.
My Photo Stream
Photo Stream collects last 1,000 photos from library and put them on all connected devices. When this option is enabled, it actively uses megabytes of information, so in case of lack of memory is recommended to disable it.
iCloud Photo Sharing
With the launch of the service images and videos can be downloaded to the Apple cloud entirely. The originals of these files do not take up space on the iPhone and iPad.
Use Apple Music
Apple Music – its a streaming service from Apple, which allows to listen your iTunes library via the Internet. If you have a stable 3G or LTE, you can save an enormous amount of space taken up by the downloaded music. Learn more about Apple Music on official web-site
While upgrading system not only corrects earlier errors and bugs, but also clears cache and temporary files, which not only saves space, but also speeds up your iOS Device.
Bonus – Delete Photos and Videos present on Mac using interPhotos
Currently there is no standard mechanism to search for media files present on multiple devices other than manual sorting, comparison and deletion. Therefore, we have implemented this feature in our new FREE app interPhotos. The app scans your Mac and iOS device allowing you to find duplicate photos and videos and remove them with a few clicks.