Open the OneSync app.Navigate to the Synced Folders tab in the upper-right corner.
Tap the floating Plus button in the lower-right corner.Give the synced folder pair a name to make it easier to manage.
Choose which folder to sync in the Remote folder in cloud storage section.
To select your full OneDrive folder, tap Select when in the top-level view of your cloud files.
Choose a local folder to sync to under Local folder in device. We recommend creating a new one under My files for easier, top-level access in the Files app.
You need to grant OneSync permission to your data on My files in this case.
Once you're done, tap Save in the upper-right corner. You don't need to change the advanced settings below the local folder selection for the default behavior.
The new folder pair appears alongside the test pair.
Head back to the Status screen in OneSync and tap the floating two-arrow sync button in the lower-right corner to kick off the new synchronization manually.