QGIS 3.10.5-1 LTR PORTABLE (COPY AND PASTE EDITION)
a. Download ZIP file from following link:
<a href="http://www.gisminer.eu/2020/QGIS/QGIS_31051_LTR_PORTABLE_C&P_EDITION/sw/QGIS_31051_LTR_PORTABLE_C&P_EDITION.zip">QGIS
3.10.5-1 LTR PORTABLE (COPY AND PASTE EDITION)</a>
b. Unzip the file onto your PC (Windows OS, 64 bit ONLY)
c. Go to "Bin" subfolder
d. Search for "batch" and choose version to run:
e. Double click and wait..