Trouble opening .rar files

I am struggling to open a .rar file in stata. (I aim to merge it with another data set)
I have tried the following codes but the file isn't in stata format and the 'saving' function doesn't appear to work. Please can anyone advise?

net set ado "O:\_myado"
adopath + "O:\_myado"
zipfile "O:\_myado\tariffs.rar" ["O:\_myado\tariffs.rar"] , saving(tariffs.rar, replace)
unzipfile "O:\_myado\tariffs.rar" ["O:\_myado\tariffs.rar"] , saving(tariffs.rar, replace)

(I am a beginner btw)
Thank you!