i want to free up space on my imac (which has slowed down) by removing my photos to an external hard drive. I use time machine for my imac. How do i move photos from iphoto on my imac to an external hard drive? How do i move photos that are in files to an external hard drive--just connect the hard drive and drag the files onto it? I wld like to backup up EHD. I assume my options are buying another EHD or backing up to online storage. any recommendations? thks!