They are buggy/unstable and not supported by me.
Use the 2019 ones instead.
then what should I check/uncheck when install vs2019? (only the important to lessen the download size) I only have 24gb monthly of data connection
You can uncheck this part if you have it checked:
https://imgur.com/ns2gNXn
It will take about 5gb - 6gb off the download.