Re-loading data comes in handy when you make any changes to the structure of a raw data source outside of Datashift.
An example would be if you add a sensor to a monitioring station which has created a new data column in your real-time datafile.
In other words, if a datafile that is connected to Datashift in real-time has a change in the number of columns you can re-load the file to add the new column(s) to your file.
To re-load a datafile:
You'll be prompted with a warning reminding you that all data will be delete and re-uploaded.