Originally Posted by
cneedha
I recently acquired a cheap (and legitimate!!) copy of Adobe CS4. I have always shot my pictures in Canon RAW format, which gives me a ~12MB file from my 5D. When messing with the image in Aperture the file size doesn't grow much, maybe a MB or so. When I use Photoshop I was unpleasantly surprised to see my files explode to 55MB+, depending on how many layers I apply. I'm talking about .psd files here.
Any suggestions out there for a workflow that takes file size as an important consideration? Does anyone even keep files in the .psd format? I would like to continue using Aperture as my archiving/file management tool. I checked the tutorials for advice and found some techincal info about RAW, TIFF, etc but not photoshop format files.