I'm not new to computers but I am when dealing with problems when they arise. I took my macbook pro into the apple store to have some keys replaced on my keyboard. that's ALL. My computer has not had any other issues - been working perfectly! I got home and started having issues with it staying connected to internet. I'm using a router and my ISP is a local company (rural net). Tower based. I was getting dropped or not able to load pages. Thought it was a router issue. But desktop was working and staying connected fine as was phone. I've spent 3 days on the phone with apple with them trying to trouble shoot with settings etc. NOTHING has worked. I keep getting a page that says timed out. I have googled that and see others have had the same issue. Apple even had me do the same things that I had already tried on my own. Like right now, all morning, it has been working fine! So it's a hit and miss. As soon as it stops, I go to the desk top and it loads fine and works. So something is up with this laptop. Anyway... Apple said to bring it in but to make sure I back up everything in case they do a re-install. I have never done this before. They said to go get an external HD and use time machine. They said it was SUPER easy - just follow the steps and let it do it's thing. Will time machine transfer everything? Mostly I don't want to loose my folder with all my pictures, my emails, and bookmarked pages in chrome. I don't have any music or videos.