Troubleshooting

I have had an exceedingly long and stressful day today. Simply creating my Animatic. I made a major, but simple mistake, and could not work out what it was. After speakin to people about the problem, i soon found out the mistake. Basically all it was to do wif, was my photoshop files, where i had scanned in my storyboards. The files were so big, meaning that it made my composition as big as the images, resulting to a 54. gb video. It kept crashing my mac, and i could not play the video. After realising this, i went back into photoshop, and changed my images size. This resolved the problem, then i could see the difference in size, with in my composition box, in the top left corner, like in the picture below.