So, when you download tails onto a usb drive, can you plug the drive into a computer, boot NORMALLY, and access the files on the drive, or do you have to boot tails to access them?

I'm not sure I understand your question correctly but a USB stick with Tails installed has typically two partitions: the first one, labeled "Tails" is a FAT partition without encryption and containing the operating system, the second one, labeled "TailsData" is an encrypted ext3 partition and used for persistence.

When I plug a Tails USB stick in my everyday Linux system I can open both the "Tails" partition and the "TailsData" (after giving its passphrase). If you're on Windows you might be able to open the encrypted partition using FreeOTFE.

Comment by Tails Wed 24 Apr 2013 10:00:23 PM CEST
Reminder: Accessing sensitive files created or related-to Tails on a regular (non-anonymous) OS as well as vice-versa could present a number of different dangers. Think carefully first.
Comment by Anonymous Wed 05 Jun 2013 12:09:13 AM CEST