Make a file writable in order to add new packages

Question

I use Rstudio and try to add new packages through command console.

It fails to install it for this reason

install.packages(\"devtools\"); devtools::i         


        

Answer 1

Changing the security setting on the R folder to "full control" fixed this for me. See the third posting down at this link for step by step instructions: Unable to update R packages in default library on Windows 7