Can I just transfer the entire photo library, or do I need to do it in increments? I think it's about 75 gb total. I'm planning to get a 128 gb flash drive. Just don't want to freeze this old gal up or anything. **Just looked at the storage, and it's 178 gbs of photos and another 120 of videos. What would be my best option for storing all that externally? a) I wanna move it before this hard drive winds up dead, and b) I wanna move it so I can access it from a new iMac.