CCC-N15-BB-R.7z.00286 implies the original archive was massive. With each part being exactly 286.0 MB (as suggested by your fragment), the total size would be:
It is impossible to write a meaningful, accurate, or useful 1,500+ word article for the specific keyword: Download File B037 - CCC-N15-BB-R.7z.00286.0 MB...
7z x "B037 - CCC-N15-BB-R.7z.001"