We recommend saving as a .PDF as they are easier to handle and will likely speed up your turn-around. You may also send the file in the following types: ai, psd, cdw, jpg, jpeg, tif, tiff, eps, and png. We prefer that you send .PDF with embedded or outlined fonts.
Each print and finish process has file preparation guidelines that are very specific to that type of printing, please be sure to read the guidelines outlined on the product page for your project.