IMPORTRANGE is a great way to sync data between spreadsheets. It doesn’t come with without limitations. If a dataset is too large, it will provide an error message saying it’s too large. If that’s the case using a circular Import Range will be a great way to only extract specific information from the dataset that you’re actually interested in.
In this video I show to to create a dynamic circular reference between spreadsheets as well as a hack to make your spreadsheets run more efficiently.