files_external_dropbox

Flysystem based dropbox backend for Nextcloud

Requires Nextcloud 12.0 or later

Steps For Installation:

Enable the files_external app with occ app:enable files_external if not enabled yet.
~~Get the app from the app store~~
Download the source into the Nextcloud apps directory.
Make sure the unzipped directory of the app is named "files_external_dropbox" and set the directory ownership according to you setup.
Run make or composer install
Enable the app in the web interface or by running occ app:enable files_external_dropbox
Fill up the storage details (See Below Configuring OAuth2)
Fire up the files page to see the Dropbox mounted as external storage
To allow any user to configure his own dropbox storage, you need to ensure that relevant checkbox is setting under "Allow users to mount external storage"

Connecting Dropbox is a little more work because you have to create a Dropbox app. Log into the Dropbox Developers page and click Create Your App
Then choose which folders to share, or to share everything in your Dropbox.
Name Your App and then click Create App
Under the section OAuth2 Redirect URIs add a new URL http://path/to/nextcloud/index.php/settings/admin/externalstorages and http://path/to/nextcloud/index.php/settings/user/externalstorages (Replace http://path/to/nextcloud/index.php with you valid Nextcloud installation path)
Then Go to nextcloud settings/admin/externalstorages and Add a new storage Dropbox V2
Fill the details Client Id, Client Secrets from your Dropbox App page (search for "App key" and "App secret")
Click Grant Access and then you will be redirected for OAuth login
After completing the OAuth you will be redirect back to Storage Section and you should see green mark along your storage configuration
That's it

This app depends on the flysystem adapter for dropbox which can be found here https://github.com/Hemant-Mann/flysystem-dropbox