Where did you see "Download File B037 - CCC-N15-BB-R.7z.00286.0 MB..." ?
The base filename is: B037 - CCC-N15-BB-R.7z Download File B037 - CCC-N15-BB-R.7z.00286.0 MB...
The "B037" and ".002" extensions indicate this is a split archive . Because the total collection is hundreds of gigabytes, it is broken into smaller chunks (in this case, 286 MB pieces) to make downloading and hosting easier. Where did you see "Download File B037 - CCC-N15-BB-R
Split archives (multi-part archives) are used for three primary reasons: Download File B037 - CCC-N15-BB-R.7z.00286.0 MB...