You can import the folder as was said you can also download the patch install files by themselves.
-Open up Galaxy or GOG.com
-Go into Witcher 3
-Click Backup and Extras for Galaxy or View Downloads for GOG.com
-Select Patch 1.02 and 1.05 to download.
If you need to download these on the first PC you can then just throw these on a flash drive then install them on the other computer after telling it where the files are.
problem is, whenever I start up the .exe file for the patch, it doesn't let me choose where to install into, so it automatically installs it onto the original place and i'll have to always copy the whole folder cause I don't know what files were changed.