install / setup:

• DropboxAPI module
  • download and install DropboxAPI module, adding to your site/modules folder
  • install in modules section of admin
  • goto: https://www.dropbox.com/developers/apps
  • add new app
  • choose dropbox api, folder access, then name the folder which will appear in your dropbox /apps/
  • copy api codes and add to DropboxAPI settings.
• InputfieldDropbox module
  • download and install InputfieldDropbox module, adding to your site/modules folder
  • install in modules section of admin
  • add new textarea field in processwire admin, save
  • within Details tab, select Dropbox on Input type select box.