A large file is something that is too big for your email program or server to handle. If you try to attach something to your email program and you get a message that tells you the object is too big for the server, it means that the file is too large to be sent via email. However, if you need to send that file to someone, there are other ways to make sure it gets there.
Save the file on your desktop with a name you will remember. This will help you make sure you don't lose the file, even as you try to send it through email.
Right-click your desktop and choose "Create New" and then "Folder." Give the folder a name you'll remember. Drag the file you wish to email into the folder. Right-click on the folder and choose "Send to" and then "Zip folder." This will compress the file into a more manageable size. Try to send it through email. If it goes through, you don't need to do anything else. If it is still too large, you can continue to the next step.
Click on a free file hosting site (see Resources). Create an account and then upload the large file. Email the recipient the link to the file hosting site, which you will get when you finish uploading the file. They can visit the site and download the file for themselves.