How to save glove.6B.100d.txt file from Coursera?

You can also get all of the other GloVe materials directly from that Stanford link, including other sizes (dimensions) of embedding matrices, source text and source code.

Coursera seems to impose size limits on downloads. There have been threads in the past covering how to compress and/or break up and download large files using transport other than HTTP. h5py files have been problematic, for example