My I add,
If you can, compress your map files by WinZip or WinRar before you post.

There are several benefits for doing so.
1. The file size is smaller, so takes less time to upload and download.
2. Better integrity check, you know a downloaded file is corrupted or not when you unzip or unrar.
On the other hand, when someone reports a problem with a downloaded map/file without compression,
you don't know if the map/file is corrupted or not to start with.
3. The original timestamp of the maps/files are preserved in the zip or rar file.