When bulk downloading more than 800 MB of files, your download will be split across multiple ZIP files. They will be named "1_of_3_something.zip", then "2_of_3...zip", then "3_of_3...zip". Your download is split up to make it easier for you to download and decompress the files.
Follow these steps to combine all your files into a single folder after download:
First, download every ZIP file to your local computer desktop. Do not try to open the ZIP file directly in your browser — instead, choose to "Save" the file on your desktop.
Place the downloaded ZIP files together on your desktop:
Create a new empty folder on your desktop next to the ZIP files (new folder "everything" in this example):
Open the first ZIP, and then "drag" its contents into the new folder. Note that the first ZIP contains the "readme.html" file:
Then open the other ZIP files in order, and "drag" their contents into the new folder. When dragging contents of these later folders, you will be prompted to merge the contents. Choose "Yes".
After the contents of all numbered ZIP files have been dragged into the single folder, you may delete the numbered ZIP files. All of your downloaded files are now together in a single folder on your desktop.