Finished?
I know 0 about USB drives. Am assuming this 32GB will hold all my pictures and files (no videos). When do I know the files are all transferred?
It really depends on the operating system of the computer you are using, but most are pretty similar. In windows you would see your flash drive as a drive after plugging it in, and then you can copy/paste or drag/drop files onto the drive. There will then be a dialog box that comes up that shows progress of the transfer, that will disappear once the transfer is complete. On OS X the drive will show up in your finder and the process for copying files is the same as windows.
32GB should hold quite a bit of pictures. You could put any files including video's though videos will take up a lot more space obviously.