OK, so since I couldn't get my iPT6 to be seen by iTunes on my iMac, I broke down and decided to update from iOS 8.4 to 9.2. I did that from my iPT6 - since like I said, iTunes couldn't see it. BUT, I did it while I had the iPT6 cabled to my iMac with iTunes open. Everything seemed to have gone OK - i.e. my iPT6 announced that I'm on 9.2, and lo and behold iTunes saw my iPod, and started backing it up. Well. That's my next issue. It's been backing up for 17 hours now. The arrows spinning and the blue line on top of the iTunes showing "Step 2 of 7" and it's been like this for 17 hours with no progress - it's backing up to the computer. I have a 64GB iPT6, and it shows 40.16GB as free. I have a few videos, very little music (like 3 albums), maybe about 100 books in GoodReader and KindleApp, and a bunch of apps that I rarely use. Even though the iPod was fully charged when I began this operation, and it's been connected to my iMac this whole time by USB cable, it shows now battery almost gone and a red bar status. Question: how long is this backup supposed to take?? And can I just disconnect the iPod if it doesn't complete? Is it hung up? TIA!