If you have ever noticed, all the photos that you upload from your iOS device over to Google Drive have HEIC as their file format.
Many of the iOS users prefer to store their photos on Google Drive as it allows the users to free-up the memory space occupied by these large-sized photos on your devices. It supports all kinds of files to be stored on it including your photos. Google Drive is one of the popular cloud services available in the market to help you store and retrieve your files.
