I recently made the switch from an iPhone to the Samsung S20. I have managed to successfully transfer all my images and videos across to my new phone (~12000 files). I would like to backup all of these images/videos to Google Photos. However, when I check Google Photos, it only appears to be backing up the images I took from my Samsung S20 – none of the old images that I took with my iPhone are appearing, even though these are visible on my phone?
I have checked the details for one of these old iPhone images on my S20, and I can see that it is stored in Internal storage/iPhoneData/Pictures, and it is a HEIC file. Does that provide any possible explanation for why these are not backing up to Google Photos? And is anyone able to provide a possible solution to this?