File never synced with Amazon Drive

I have a folder synced with Amazon Drive. I’ve copied a file to this folder (Thumbs.db) and It is never uploaded to Amazon Drive. I’ve waited a lot and nothing happens. I’ve tried to remove the file and copy It again and It never works.

I uploaded the file through the web interface and It worked.

How can I see what is happening with this file?

Hi @pedromottacardoso,
thumbs.db is on our list of ignored files, so it will not be synced. Take a look at this section of our documentation for more information: