Minecraft wiki entry for Map_downloads, associated text: On Windows, you can press Win+R to open the run dialog, then paste the Minecraft folder location in there.
You can also drag and drop folders to the saves folder, which might save you time from copy-pasting.
On Bedrock, you might see jumbled letters in the folder names like fgEHfhgyEbdh. This is normal, and you can always rename them for easy identification.
To access map datapacks or resource packs, you can access them by copying the contents inside the map to the main folders.