Using power shell run this below script.
  1. $FolderPath = "c:\Solutions"
  2. foreach ($solution in Get-SPSolution)
  3. {
  4. $id = $Solution.SolutionID
  5. $title = $Solution.Name
  6. $filename = $Solution.SolutionFile.Name
  7. $solution.SolutionFile.SaveAs("$FolderPath\$filename")
  8. }
cmd