With the release of iOS 11 and macOS High Sierra in 2017, Apple made the shift to HEIC and HEVC photo and video formats. These file formats can compress photos by up to 50% without losing any image quality.
The major problem is that HEIC and HEVC format is not widely supported (mainly on PC or other devices).
To transfer photo to other devices in .jpeg format here it is procedure that you should apply to your iphone
- Go to Settings > Photos.
- Scroll down to the Transfer to Mac or PC section.
- Tap Automatic.
more details are here indicated
