Smart Sync download error from External Hard Drive

[clerman]

I'm going bonkers trying to sync from an external hard drive to my mac (running High Sierra). The files origiannly were on my NAS, I did a back up and clean, and now I'm trying to re populate an updated NAS system. 

I keep getting two errors, one from finder saying "The Finder can't complete the operation because some data in " " can't be read or written. (Error code -36)" AND at the same time, I am getting a drop box error saying "Smart Sync Download 'File Name' is an online-only file. To open it, first move it into your Dropbox folder."

I can't move it into my dropbox folder, I tried erasing any invisible .DS files (and restarting the computer) that didn't work. I tried moving them with Terminal, didn't work. I tried using the program 'one command', that didn't work. I tried with chronosync (ignor permissions) that didn't work. I somehow got them onto this drive (Mac OS Extended (Journaled)) but I can't get them off. So far, the issue seems to be specific to movie and audio files but so far that's what I've mainly been syncing, so I may just haven't found other issues. 

Please help!

[Daphne]

Hello there @clerman, I hope you're well today!

Just to clarify, can you let me know the file path of where the Dropbox folder is hosted?

From the OS error that you're getting, it may be related to the file format or a permissions related error. 

I can suggest having a look here as a start to see if that helps at all.

Hope this helps to some extent!