MiKTeX: [...] does not seem to be a local package repository

In addition to any package archive you store in any directory, at least these three other files need to be present:

miktex-zzdb1-2.9.tar.lzma
miktex-zzdb2-2.9.tar.lzma
miktex-zzdb3-2.9.tar.lzma 

These three contain the complete package list. Once those archives are present, the directory/folder can be specified as local package repository


These CURRENT archives can be found at CTAN.
Use this Link above and in browser search for miktex-zz