The wizard is accessible to use in the navigation drawer menu at any time (as for the 1Storage Android app).

Once you have backed up your device, you can open the backup wizard at a future date to scan for new files that were not previously uploaded! This can also be done in case of an outage or break in a previously run backup operation.

The backup wizard operates independently from the Camera Auto Upload function so you don't have to use both - it's up to you!