I always found it very slow copying files as a network share from Host to PC e.g. at 10 MB/s.

Today, I had to copy a file, and it blitzed along at 80 MB/S which is not far off my hard drive maximum speed.

This is using 16299 Fast/Slow Ring build.

As an aside, I sometimes used to just mount the vhd in Host to copy large files (still do for the uup folder).