HDX can live-link to and preview files stored in any Dropbox folder and even preview them if they are in CSV or XLS format. You must login to Dropbox via the web application and navigate to the folder containing the spreadsheet (or other file) that you want to share. Select the file and choose ‘Share link’, following the instructions in the Dropbox help centre. You will then receive a special link that allows anyone to download the file.

Add that link as a resource to your HDX dataset. When you receive a Dropbox link, it normally looks something like this:
https://www.dropbox.com/etc/etc/your_file_name.csv?dl=0

For HDX to be able to process and preview your file, you’ll need to change the last ‘0’ to a ‘1’ so that it looks like this:
https://www.dropbox.com/etc/etc/your_file_name.csv?dl=1

The HDX resource will automatically track any changes you save to the Dropbox file on your own computer. Be careful not to move or rename the file after you share it.