What you can expect:
You can see and edit your Dropbox files in Xodo by opening them via Dropbox tap in Xodo or by opening them via Dropbox app.
Method 1: Open a file via Dropbox app
1. Open the Dropbox app. Tap on the button in front of the file you want to open.
2. Select Open with.. then select Xodo.
Method 2: Open a file via Dropbox tab in Xodo
2. Choose the file you want to edit. Once it's finished loading, it should open automatically in Xodo.
Accessing Google Drive files with Xodo
Accessing OneDrive files with Xodo
Syncing files between Android and Windows