The HLSv1.4 S30 and L30 files are available at https://hls.gsfc.nasa.gov/data/v1.4.

The v1.4 data directory structure is
as follows:

HLS_Product/year/Tile_subdir/

where

HLS_Product is the HLS product type (S30 or L30) [3 characters]

Year is the sensing time year [4 digits]

Tile_subdir is sub-directory path for an HLS Tile ID decomposed into 4 parts.
For example, tile 11SPC corresponds to a sub-directory
11/S/P/C/
and L30 data of 2018 for tile 11SPC are at

https://hls.gsfc.nasa.gov/data/v1.4/L30/2018/11/S/P/C

A Bash script is available in the Documents section to help download the products for an environment where either the Linux command wget or curl is available.