Eugene's observations

Most email services limit the size of attachments to around 25 MB or less.  But sometimes you want to send one-off larger files right ?  Here are some options to consider; most free.

• Create a Dropbox account and share a file or folder.  2GB is free but this can easily be increased by recommending others etc.   More space (currently 15GB) is available with a Google Drive or Microsoft OneDrive account.
  
  
• Use a free web service to email large files such as https://www.wetransfer.com/ (currently up to 2GB is free)
  
  
• If you have a Skype contact you can click Conversation > Send > File...   (or Shift/Ctrl/F) 
  
  
• Web sites like Box.com are designed for sharing files.  See 
  https://www.box.com/en_GB/personal/send-big-files-fast/
  
  
• http://www.mega.co.nz/ offers a similar service for transferring large files.
  
  
• If both sides have a Google account you can share a link to a file or folder that breaks all normal size limitations by copying the file(s) to Google Drive.

There are surely others, please let me know if you find another service or method of sending large files.