Q: Can't eject shuffle as files in use by another application?

Hi Eliejay,

Welcome to the Support Communities!  The article below explains what the flashing orange light on your iPod shuffle indicates:

iPod shuffle (4th generation): Checking battery status

http://support.apple.com/kb/HT4310

If you are using a Mac, you can Force Quit all open applications to close any that may be accessing your shuffle:

OS X: How to quit an unresponsive application using Force Quit

http://support.apple.com/kb/ht3411

This article explains how to get out of Disk Use mode in iTunes:

Using your iPod as a storage drive

http://support.apple.com/kb/HT1478

Cheers,

- Judy