Due to their file size, we don’t support native Photoshop files otherwise known as PSDs in My Design Center.
We do however, offer full support for Tiffs with compression which has all the same features of a PSD (layers, smart objects, transparency, etc.) as well as lossless file compression.
What does this mean?
You can re-save a complex layered PSD file in the Tiff format and get every benefit you would have by submitting a PSD in terms of functionality and quality but with a much quicker upload time and full support directly within MDC.
Below are the steps for saving a layered Tiff with transparency.