I run Ubuntu from a USB (run the whole OS from it, persistent) and want to access files such as my pictures or documents from Windows 7, is it possible to do so? How?
You need to mount the partition that contains you files. Run this on Terminal:
It should be something like
To locate which partition has your files, probably the one Windows 7 is installed in, then perform the following command:
Where X is the number of the partition you want to mount, like /dev/sda1 or /dev/sda2.
It should mount the disk with full access, so you can copy and paste files to those folders. More about mount.
Remember, it will mount your whole Windows 7 partition to a folder, so be carefull not to delete anything important.