For windows users
"When you plug your iPod nano into a power source, the charging icon appears?it's a lightning bolt over a battery. Depending on the state of the battery, it may or may not animate (flash between gray and green). In either case, the icon indicates the battery is charging successfully. When the battery is fully depleted, the iPod nano may not appear in iTunes until it has been charged for about 10 minutes.
The non-animated version of the icon, shown above, appears when your battery has been fully or nearly depleted of charge. This appears for up to 10 minutes. Note: If your iPod nano is connected to the computer, the computer won't see it until after that 10 minutes has elapsed. After that, you'll see the ""Do not disconnect"" screen.
Here's the animated version you would see after 10 minutes, or when the battery is not fully drained:
If the charging icon is flashing and your computer doesn't recognize it,
Can't see your iPod in iTunes or Windows Explorer? Remember these five basic suggestions when you run into a problem with your iPod. If one of the following doesn?t help, read on for solutions to specific problems.
Reset, Retry, Restart, Reinstall , Restore
Reset your iPod.
Retry with a different USB port.
Restart your computer and make sure you have the latest software updates installed.
Remove iTunes software and then reinstall iPod and iTunes software from latest versions on the web.
Restore your iPod. See ?Updating and Restoring iPod Software? in the user's guide.
Still can't see your iPod?
Several things could keep iPod from appearing in iTunes or Windows Explorer. The most likely causes are listed below?you'll find information for both USB and FireWire (IEEE 1394) iPod connections. Check each one starting from the top of the list to see if that is what's keeping iPod from appearing.
iPod appears in Windows Explorer but not in iTunes or iPod Updater
If your iPod shows up in My Computer, but iTunes and iPod Updater don't recognize it, there may be a software conflict, or iPod Service didn't load. You may see an ""iPod Service Error"" alert or a ""Please Reinstall iTunes"" message.
If you see either of these messages, try the solutions in this article to resolve the issue.
Laptop or portable connecting via USB?
See iPod not recognized when connected to Windows laptop over USB for more information.
Your computer doesn't meet iPod system requirements
Make sure that your computer meets the system requirements to use iPod for Windows.
Your iPod displays an exclamation point folder or sad iPod icon, or doesn't appear in iTunes or My Computer
If your iPod displays a folder with an exclamation point icon or a sad (unhappy) iPod icon on its screen, or if your iPod doesn't appear in iTunes or My Computer, follow these instructions to resolve the issue.
Your iPod isn't formatted for Windows
iPod for Windows Software only recognizes iPod for Windows. You cannot use iPod for Macintosh