I installed both Google Drive and Drop Box on my iPad, both work but I find Drop Box works the best IMHO. With Drop Box I can view a group of pictures by sliding the screen, in Google Drive I can't do this I only can view one picture at a time. Also Google Drive only give you 2GB free Drop Box gives you 5GB free. Both will Sync your files to computers and smart phones, giving you access to them on all other devices. What do you think?