# SD-card picker The sample app demonstrates the SD-card file chooser in action. No configuration is necessary for that. # Dropbox picker If you want to try the Dropbox part of the sample, you'll need to get your own API-keys at [https://www.dropbox.com/developers/apps](https://www.dropbox.com/developers/apps) and insert them into DropboxSyncHelper.java and AndroidManifest.xml. See Dropbox for more details on that: The dropbox sample uses the Core API. If you want to use the Sync API, have look at: https://github.com/spacecowboy/NotePad/tree/master/core/src/com/nononsenseapps/filepicker for an example of that.