When you say "Small Datasets" or "Large Datasets" or talk about the size of a dataset, what exactly do you mean?
When we say dataset, we're talking about all of the information we need to export your report in the format that you've specified. In this context, the word size is hard to define. By clicking a single checkbox you can vary the size of your dataset hugely. A small dataset is classified as anything under 10,000 units. A large dataset is anything between 10,000 and 100,000 units. A unit is a measurement of work that the server has to do to fill in your report. Three separate elements of your report contribute to the final unit count.