Dear Paul,
Thanks for the reply. I didn’t know that .h5 and .mat files were symlinks.
Downloading both by using 'tar czhvf *.tgz *.h5andtar czhvf *.tgz *.mat` worked as you explained in the shared above thread (Unable to download resnet50.h5 of Week 2's assignment Residual Networks - #2 by paulinpaloalto)!
In addition, I can assure you that direct downloading of the .h5 file worked, but I couldn’t download the .mat file of the assignment I mentioned above. I think the reason is the file size for .mat that is approximately 345MB, i.e., exceeds 100MB, whereas for .h5 file it is approximately 80MB.
Henrikh