If data is not removed during a reset, what is a suggested action?

When data is not removed during a reset, a recommended action is to update the iOS or utilize third-party software. This approach can help ensure that the device's software is functioning optimally and may address issues causing residual data to persist after the reset. Updating iOS can include bug fixes and improvements that better manage data storage, potentially leading to a more effective reset. Additionally, certain third-party software tools are designed specifically to assist with completely wiping data securely, which can be particularly useful when standard methods do not yield the desired results.

In this context, performing a factory reset usually would remove all data, so it's not appropriate if data remains post-reset. Changing device settings does not address the underlying issue of data retention, and manually deleting data prior to a reset could be time-consuming and may not guarantee that all residual data is erased effectively. Therefore, updating the iOS or using third-party software stands out as a comprehensive solution to ensuring that any lingering data is appropriately handled.