Update README.md

README.md

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 * choose corresponding example data set(s) and download from Box.com: [click here](https://oregonstate.box.com/s/flpkr969do6v1h5a8qwfw5t49c7ivzgl)
 * run Jupyter notebook to use SCARR
 
+*** Important note for downloading from Box.com: *** we are currently in the process of finding optimized ways for making the download process more convenient and more reliable. Until then, please avoid downloading whole directories that also have trace files in them, as Box.com will attempt to create a .zip prior to the download (causing a time out while doing so). Select and download data sets only individually. The Jupyter notebooks will soon be included as a submodule.
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 # SCARR's File Format for Side-Channel Analysis Data
 
 [Zarr](https://zarr.dev/) is a great file format and we use its DirectoryStore as SCARR's native file format. Each data set is represented by a directory that contains the following basic structure: