For files, photos and videos I've found google drive and google photos to be a great combination. Google photos immediately backs up phone content to their 'cloud' and syncs with your computers using google drive.

Recently google announced google drive would be discontinued December 2018 and replaced with two different solutions, one for home use and one for corporate use, for Home it’ll be 'back up and sync' and then for us it’ll be 'google drive file stream'.