Move r packages to new computer which has no internet

The function .libPaths will give you a vector of all the libraries on your machine. Run this on your old machine to find all of them. You can simply copy all these files into the libraries on your new machine (run .libPaths on it too to find out where).

Alternatively, if you want to set up a real repository (i.e. basically a CRAN mirror) on your computer or on a network drive you can update, you can put binary or source packages into a folder and run tools::write_PACKAGES on that folder. You can them run install.packages using the contriburl argument and point it to your repository folder.

All packages that you have installed are stored in a folder called win-library\r-version, for example, C:\Users\Ehsan\Documents\R\win-library\2.15 so, it is enough to copy all the folders inside 2.15 to the same folder in your new machine. because you have the same version of R you do not need to update them by update.packages().