"No such file or directory" error?

[emnu2005]

My associate shared a folder filled with CR2 (camera RAW) files with me. I've added the folder to my Dropbox account, and downloaded to my computer. The folder downloads successfully as a zip file, but when I attempt to open I get an "Unable to expand. Error 2: No such file or directory" error. 

I can see the files in my Dropbox account just fine, and I can download them individually without issue. There are 400 of them, though, and I don't want to download one at a time. 

Can anyone help me troubleshoot please? TIA!

[axnjxn5333]

Dropbox -- it is completely unacceptable that I cannot download a file from my account and then ou say I need to download some other third party app to unzip a file??!!??  Are you serious?  I dn't have time for this clown show and there fore the solution is to QUIT DROPBOX immediately (I recommend everyone here do so) and use Google Drive.  It's unconscienable that I cannot download and unzip on my Mac given that you are a storage site.  I am now completely SCREWED not being able to get a project done by deadline this morning.   The only solutions here are the dowload winzip... I have a Mac.  Dropbox you are FIRED and I will never use or recommend you for anyone, anytime EVER.