This issue was resolved by ignoring the message, then locating a suitable directory and saving the file for the first time.
After this, there was the issue that the file was corrupted when trying to open the file. What the problem is here is that the file was opened immediately after the file was saved and the file had not finalised being written to.
There is a painfully long amount of time for saving the file even though the file size is small. The fix to this is to advise the user to allow up to a minute of waiting time after saving the file to allow the file to be fully written to.
This can be examined by observing the file size straight after saving the file, it is evident that the data is streaming to the file painfully slow.