If I understand your post correctly, you want to just create an email and attach some folder or other to the email. That won't work.
However, it seems there are workarounds. If you have a number of files you want to send, copy them to some new, temporary folder, then Zip the folder to compress it, and attach that. More details here;
Beware that most email providers place a limit on attachment size. Some as low as 20MB.
is it possible to attach a folder in an email? if so how? please explain in details