@Simon Yep, you're likely right! I'll probably do that. Fortunately, I figured out that I can simply share TIFF tiles and associated files from the original destination. My problem was that I shared files from a "secondary destination" (which lacked certain files, like .ftw and .msk), not the original.

@Simon Also, the webpage's question is somewhat similar, where exporting something creates an incomplete result. Thanks for your help!

@lpdudley That looks worth asking a question on Main for. It sounds like you know what you want to do and can describe, have tried something that you can describe, and are now stuck at a point that you can describe.