Hi @JordanHags, thanks for posting on the Community!
Could you clarify the error message you’re getting? If the file can’t open any more, you might have removed the file extension to the song, which means the Dropbox Android app doesn’t know how to preview it.
Assuming it’s a normal MP3 file, try adding .mp3 to the filename to see if this helps, or if you know it, the correct file extension.
Keep me posted!