I'm not really sure what you're referring to; the limit on disk usage is 512 megabytes, 50,000 total files and folders, and 10 megabyte max file size.
It sounds like you know what you're doing, but make sure you follow the terms of service with media files. I didn't do any research on what you're doing, but some files require attribution even though they're free to use. Just watching out for you.